Lotto-Belisol’s Andre Greipel won the sprint finish in the fourth stage of the Eneco Tour overnight as reigning champion Lars Boom moved into the leader’s jersey.

Andrei Greipel wins stage 4 of the 2013 Eneco Tour.

Greipel proved to be a class above the competition in the final stages of the 169km ride from Essen to Vlijmen, finishing well clear of Italian Giacomo Nizzolo in second with Boom third.

Boom’s third place was enough to move the Dutchman ahead of France’s Arnaud Demare in the overall standings due to bonus time on offer at the finish.

Demare dropped to third, three seconds off Belkin’s Boom, with Greipel moving up to second overall, just one second behind, thanks to his victory.

Team Sky’s Bradley Wiggins, last year’s Tour de France winner, was affected by a crash which split the peloton and lost 3 minutes 11 seconds on the day to fall 9 minutes 37 seconds adrift of the overall lead. However, he is fancied to win tonight’s fifth stage, a 13.2km time trial from Sittard to Geleen.

Race Results

Eneco Tour (2013) - Stage 4

Essen to Vlijmen (170km)
15 Aug 2013
Stage 7  |  Stage 6  |  Stage 5  |  Stage 4  |  Stage 3  |  Stage 2  |  Stage 1


Stage
Position Name Nationality Team Time
1 GREIPEL, André GER LOTTO BELISOL 3:47:36
2 NIZZOLO, Giacomo ITA Radioshack Leopard 0
3 BOOM, Lars NED Belkin
4 PETACCHI, Alessandro ITA OMEGA PHARMA-QUICKSTEP
5 PORSEV, Alexander RUS KATUSHA
6 FARRAR, Tyler USA Garmin-Sharp
7 KEUKELEIRE, Jens BEL ORICA-GREENEDGE
8 HUTAROVICH, Yauheni BLR AG2R LA MONDIALE
9 VIVIANI, Elia ITA Cannondale Pro Cycling
10 SUTTON, Christopher AUS SKY PROCYCLING
11 GILBERT, Philippe BEL BMC RACING
12 STYBAR, Zdenek CZE OMEGA PHARMA-QUICKSTEP
13 DEGENKOLB, John GER ARG
14 DEMARE, Arnaud FRA FDJ-BIG MAT
15 LOBATO DEL VALLE, Juan Jose ESP EUSKALTEL - EUSKADI
16 CANTWELL, Jonathan AUS Saxo Tinkoff
17 BOZIC, Borut SLO ASTANA
18 IGLINSKIY, Maxim KAZ ASTANA
19 VAN STAEYEN, Michael BEL TOPSPORT VLAANDEREN - MERCATOR
20 OFFREDO, Yoann FRA FDJ-BIG MAT
21 OSS, Daniel ITA BMC RACING
22 IMPEY, Daryl RSA ORICA-GREENEDGE
23 KRUOPIS, Aidis LTU ORICA-GREENEDGE
24 DE WEERT, Kevin BEL OMEGA PHARMA-QUICKSTEP
25 STANNARD, Ian GBR SKY PROCYCLING
26 PARISIEN, Francois CAN ARG
27 GRIVKO, Andriy UKR ASTANA
28 ROELANDTS, Jurgen BEL LOTTO BELISOL 6
29 NAPOLITANO, Danilo ITA ACCENT JOBS - WILLEMS VERANDA'S
30 LANGEVELD, Sebastian NED ORICA-GREENEDGE
31 LODEWYCK, Klaas BEL BMC RACING
32 APPOLLONIO, Davide ITA AG2R LA MONDIALE
33 TSATEVITCH, Alexey RUS KATUSHA
34 VAN DIJK, Stefan NED ACCENT JOBS - WILLEMS VERANDA'S
35 BAZAYEV, Assan KAZ ASTANA
36 RICHEZE, Ariel Maximiliano ARG LAMPRE - ISD
37 VEELERS, Tom NED ARG
38 WELLENS, Tim BEL LOTTO BELISOL
39 ROLLIN, Dominique CAN FDJ-BIG MAT
40 VAN HOECKE, Gijs BEL TOPSPORT VLAANDEREN - MERCATOR
41 DUMOULIN, Tom NED ARG
42 FERNANDEZ, Koldo ESP Garmin-Sharp
43 PHINNEY, Taylor USA BMC RACING
44 SELVAGGI, Mirko ITA VACANSOLEIL-DCM
45 WEENING, Pieter NED ORICA-GREENEDGE
46 MONFORT, Maxime BEL Radioshack Leopard
47 KELDERMAN, Wilco NED Belkin
48 QUINZIATO, Manuel ITA BMC RACING
49 LADAGNOUS, Matthieu FRA FDJ-BIG MAT
50 CHAVANEL, Sylvain FRA OMEGA PHARMA-QUICKSTEP
51 TERPSTRA, Niki NED OMEGA PHARMA-QUICKSTEP
52 GUSEV, Vladimir RUS KATUSHA
53 TANKINK, Bram NED Belkin
54 MOSER, Moreno ITA Cannondale Pro Cycling
55 DECLERCQ, Tim BEL TOPSPORT VLAANDEREN - MERCATOR
56 HOOGERLAND, Johnny NED VACANSOLEIL-DCM
57 KUZNETSOV, Viacheslav RUS KATUSHA
58 KROON, Karsten NED Saxo Tinkoff
59 BOARO, Manuele ITA Saxo Tinkoff
60 BAKELANTS, Jan BEL Radioshack Leopard
61 VAN KEIRSBULCK, Guillaume BEL OMEGA PHARMA-QUICKSTEP
62 DALL'ANTONIA, Tiziano ITA Cannondale Pro Cycling
63 KREDER, Raymond NED Garmin-Sharp
64 SICARD, Romain FRA EUSKALTEL - EUSKADI
65 JACOBS, Pieter BEL TOPSPORT VLAANDEREN - MERCATOR
66 CURVERS, Roy NED ARG
67 BRAVO OIARBIDE, Garikoitz ESP EUSKALTEL - EUSKADI
68 WYSS, Danilo SUI BMC RACING
69 RASMUSSEN, Alex DEN Garmin-Sharp
70 KERN, Julian GER AG2R LA MONDIALE
71 TERUEL ROVIRA, Eloy ESP MOVISTAR
72 VAN EMDEN, Jos NED Belkin 14
73 VANSPEYBROUCK, Pieter BEL TOPSPORT VLAANDEREN - MERCATOR
74 HABEAUX, Gregory BEL ACCENT JOBS - WILLEMS VERANDA'S 21
75 TIMMER, Albert NED ARG 23
76 RASCH, Gabriel NOR SKY PROCYCLING
77 WESTRA, Lieuwe NED VACANSOLEIL-DCM 26
78 JUNGELS, Bob LUX Radioshack Leopard 29
79 BOUCHER, David FRA FDJ-BIG MAT
80 SPILAK, Simon SLO KATUSHA
81 DOMONT, Axel FRA AG2R LA MONDIALE
82 BAGDONAS, Gediminas LTU AG2R LA MONDIALE
83 DELAGE, Mickael FRA FDJ-BIG MAT
84 HOULE, Hugo CAN AG2R LA MONDIALE
85 VAN SUMMEREN, Johan BEL Garmin-Sharp
86 VANDOUSSELAERE, Sven BEL TOPSPORT VLAANDEREN - MERCATOR
87 LEUKEMANS, Björn BEL VACANSOLEIL-DCM
88 SERGENT, Jesse NZL Radioshack Leopard
89 GRUZDEV, Dmitriy KAZ ASTANA 34
90 WILLEMS, Frederik BEL LOTTO BELISOL
91 SANZ, Enrique ESP MOVISTAR
92 NUYENS, Nick BEL Garmin-Sharp
93 ANACONA GOMEZ, Winner COL LAMPRE - ISD
94 BENNATI, Daniele ITA Saxo Tinkoff
95 PEREZ MORENO, Ruben ESP EUSKALTEL - EUSKADI
96 DURBRIDGE, Luke AUS ORICA-GREENEDGE
97 TAMOURIDIS, Ioannis GRE EUSKALTEL - EUSKADI
98 ISAICHEV, Vladimir RUS KATUSHA
99 MARANGONI, Alan ITA Cannondale Pro Cycling
100 VANDENBERGH, Stijn BEL OMEGA PHARMA-QUICKSTEP
101 DRUCKER, Jean-Pierre LUX ACCENT JOBS - WILLEMS VERANDA'S
102 PIETROPOLLI, Daniele ITA LAMPRE - ISD
103 VAN POPPEL, Boy NED VACANSOLEIL-DCM
104 BELLETTI, Manuel ITA AG2R LA MONDIALE
105 RENSHAW, Mark AUS Belkin 48
106 HONDO, Danilo GER Radioshack Leopard 50
107 VANGENECHTEN, Jonas BEL LOTTO BELISOL
108 DEBUSSCHERE, Jens BEL LOTTO BELISOL +1:09
109 SCHEIRLINCKX, Staf BEL ACCENT JOBS - WILLEMS VERANDA'S +1:23
110 BRESCHEL, Matti DEN Saxo Tinkoff +1:33
111 JÖRGENSEN, Jonas Aaen DEN Saxo Tinkoff +1:46
112 KUCHYNSKI, Aliaksandr BLR KATUSHA
113 VERRAES, Benjamin BEL ACCENT JOBS - WILLEMS VERANDA'S
114 VEUCHELEN, Frederik BEL VACANSOLEIL-DCM
115 MOURIS, Jens NED ORICA-GREENEDGE
116 TUFT, Svein CAN ORICA-GREENEDGE
117 MOINARD, Amaël FRA BMC RACING
118 DODI, Luca ITA LAMPRE - ISD
119 POZZATO, Filippo ITA LAMPRE - ISD
120 VAN GOOLEN, Jurgen BEL ACCENT JOBS - WILLEMS VERANDA'S
121 BODNAR, Maciej POL Cannondale Pro Cycling
122 SMUKULIS, Gatis LAT KATUSHA
123 WACKERMANN, Luca ITA LAMPRE - ISD +1:55
124 COBO, José ESP MOVISTAR +3:11
125 MADRAZO RUIZ, Angel ESP MOVISTAR
126 VANLANDSCHOOT, James BEL ACCENT JOBS - WILLEMS VERANDA'S
127 HUFFMAN, Evan USA ASTANA
128 HUNTER, Robert RSA Garmin-Sharp
129 VIGANO, Davide ITA LAMPRE - ISD
130 BONO, Matteo ITA LAMPRE - ISD
131 EISEL, Bernhard AUT SKY PROCYCLING
132 WIGGINS, Bradley GBR SKY PROCYCLING
133 LOPEZ GARCIA, David ESP SKY PROCYCLING
134 ROJAS GIL, Jose Joaquin ESP MOVISTAR
135 MINGUEZ AYALA, Miguel ESP EUSKALTEL - EUSKADI
136 KITTEL, Marcel GER ARG
137 DE KORT, Koen NED ARG
138 MINARD, Sébastien FRA AG2R LA MONDIALE
139 MIYAZAWA, Takashi JPN Saxo Tinkoff
140 BOIVIN, Guillaume CAN Cannondale Pro Cycling
141 WALLAYS, Jelle BEL TOPSPORT VLAANDEREN - MERCATOR
142 STEEGMANS, Gert BEL OMEGA PHARMA-QUICKSTEP
143 DOCKX, Gert BEL LOTTO BELISOL
144 DE VREESE, Laurens BEL TOPSPORT VLAANDEREN - MERCATOR
145 LIGTHART, Pim NED VACANSOLEIL-DCM
146 JEANNESSON, Arnold FRA FDJ-BIG MAT +3:17
147 TJALLINGII, Maarten NED Belkin
148 BROWN, Graeme AUS Belkin
149 VAN POPPEL, Danny NED VACANSOLEIL-DCM 0
150 RAST, Grégory SUI Radioshack Leopard +3:21
151 HAYMAN, Mathew AUS SKY PROCYCLING +4:48
152 KUMP, Marko SLO Saxo Tinkoff
153 PATERSKI, Maciej POL Cannondale Pro Cycling +4:50
154 VENTOSO ALBERDI, Francisco José ESP MOVISTAR +7:04
155 ABERASTURI IZAGA, Jon ESP EUSKALTEL - EUSKADI
156 TLEUBAYEV, Ruslan KAZ ASTANA +7:49
157 GUARNIERI, Jacopo ITA ASTANA +9:43
158 VANDBORG, Brian DNK Cannondale Pro Cycling +10:04
159 KOCJAN, Jure SLO EUSKALTEL - EUSKADI
160 CORDEEL, Sander BEL LOTTO BELISOL +12:11
161 BOS, Theo NED Belkin DNF
162 DEVOLDER, Stijn BEL Radioshack Leopard DNF
163 NAVARDAUSKAS, Ramunas LTU Garmin-Sharp DNF

General Classification
Position Name Nationality Team Time
1 BOOM, Lars NED Belkin 16:06:15
2 GREIPEL, André GER LOTTO BELISOL 1
3 DEMARE, Arnaud FRA FDJ-BIG MAT 3
4 STYBAR, Zdenek CZE OMEGA PHARMA-QUICKSTEP 6
5 GILBERT, Philippe BEL BMC RACING 7
6 FARRAR, Tyler USA Garmin-Sharp 9
7 PETACCHI, Alessandro ITA OMEGA PHARMA-QUICKSTEP 13
8 NIZZOLO, Giacomo ITA Radioshack Leopard 15
9 PHINNEY, Taylor USA BMC RACING 17
10 JACOBS, Pieter BEL TOPSPORT VLAANDEREN - MERCATOR
11 PORSEV, Alexander RUS KATUSHA 18
12 CANTWELL, Jonathan AUS Saxo Tinkoff
13 OFFREDO, Yoann FRA FDJ-BIG MAT
14 IGLINSKIY, Maxim KAZ ASTANA
15 DE WEERT, Kevin BEL OMEGA PHARMA-QUICKSTEP
16 STANNARD, Ian GBR SKY PROCYCLING
17 KEUKELEIRE, Jens BEL ORICA-GREENEDGE
18 IMPEY, Daryl RSA ORICA-GREENEDGE
19 LADAGNOUS, Matthieu FRA FDJ-BIG MAT 19
20 BAKELANTS, Jan BEL Radioshack Leopard
21 DECLERCQ, Tim BEL TOPSPORT VLAANDEREN - MERCATOR 22
22 KELDERMAN, Wilco NED Belkin 24
23 LANGEVELD, Sebastian NED ORICA-GREENEDGE
24 DUMOULIN, Tom NED ARG
25 TSATEVITCH, Alexey RUS KATUSHA
26 CHAVANEL, Sylvain FRA OMEGA PHARMA-QUICKSTEP
27 TANKINK, Bram NED Belkin
28 WEENING, Pieter NED ORICA-GREENEDGE
29 KERN, Julian GER AG2R LA MONDIALE
30 SICARD, Romain FRA EUSKALTEL - EUSKADI
31 VAN STAEYEN, Michael BEL TOPSPORT VLAANDEREN - MERCATOR 25
32 VIVIANI, Elia ITA Cannondale Pro Cycling
33 GRIVKO, Andriy UKR ASTANA
34 LOBATO DEL VALLE, Juan Jose ESP EUSKALTEL - EUSKADI
35 VAN POPPEL, Danny NED VACANSOLEIL-DCM
36 GUSEV, Vladimir RUS KATUSHA 31
37 VAN HOECKE, Gijs BEL TOPSPORT VLAANDEREN - MERCATOR
38 MONFORT, Maxime BEL Radioshack Leopard
39 VAN KEIRSBULCK, Guillaume BEL OMEGA PHARMA-QUICKSTEP
40 BRAVO OIARBIDE, Garikoitz ESP EUSKALTEL - EUSKADI
41 KUZNETSOV, Viacheslav RUS KATUSHA
42 WELLENS, Tim BEL LOTTO BELISOL
43 QUINZIATO, Manuel ITA BMC RACING
44 TERPSTRA, Niki NED OMEGA PHARMA-QUICKSTEP
45 HOOGERLAND, Johnny NED VACANSOLEIL-DCM
46 MOSER, Moreno ITA Cannondale Pro Cycling
47 KROON, Karsten NED Saxo Tinkoff
48 OSS, Daniel ITA BMC RACING 46
49 DRUCKER, Jean-Pierre LUX ACCENT JOBS - WILLEMS VERANDA'S 47
50 ROELANDTS, Jurgen BEL LOTTO BELISOL 48
51 HUTAROVICH, Yauheni BLR AG2R LA MONDIALE 51
52 WESTRA, Lieuwe NED VACANSOLEIL-DCM
53 PARISIEN, Francois CAN ARG
54 DOMONT, Axel FRA AG2R LA MONDIALE 52
55 BAZAYEV, Assan KAZ ASTANA 54
56 CURVERS, Roy NED ARG
57 LEUKEMANS, Björn BEL VACANSOLEIL-DCM
58 RENSHAW, Mark AUS Belkin
59 JUNGELS, Bob LUX Radioshack Leopard
60 SPILAK, Simon SLO KATUSHA
61 SERGENT, Jesse NZL Radioshack Leopard
62 VAN DIJK, Stefan NED ACCENT JOBS - WILLEMS VERANDA'S 57
63 LODEWYCK, Klaas BEL BMC RACING
64 FERNANDEZ, Koldo ESP Garmin-Sharp
65 DALL'ANTONIA, Tiziano ITA Cannondale Pro Cycling
66 WYSS, Danilo SUI BMC RACING
67 PEREZ MORENO, Ruben ESP EUSKALTEL - EUSKADI 59
68 PIETROPOLLI, Daniele ITA LAMPRE - ISD
69 DEGENKOLB, John GER ARG +1:04
70 VANSPEYBROUCK, Pieter BEL TOPSPORT VLAANDEREN - MERCATOR +1:05
71 VEELERS, Tom NED ARG +1:10
72 TERUEL ROVIRA, Eloy ESP MOVISTAR +1:13
73 RASCH, Gabriel NOR SKY PROCYCLING +1:14
74 SELVAGGI, Mirko ITA VACANSOLEIL-DCM +1:15
75 BELLETTI, Manuel ITA AG2R LA MONDIALE +1:16
76 HOULE, Hugo CAN AG2R LA MONDIALE +1:20
77 DELAGE, Mickael FRA FDJ-BIG MAT
78 TAMOURIDIS, Ioannis GRE EUSKALTEL - EUSKADI +1:22
79 ROLLIN, Dominique CAN FDJ-BIG MAT +1:25
80 VANDENBERGH, Stijn BEL OMEGA PHARMA-QUICKSTEP
81 SUTTON, Christopher AUS SKY PROCYCLING +1:35
82 KRUOPIS, Aidis LTU ORICA-GREENEDGE
83 RICHEZE, Ariel Maximiliano ARG LAMPRE - ISD +1:39
84 DURBRIDGE, Luke AUS ORICA-GREENEDGE +1:46
85 NUYENS, Nick BEL Garmin-Sharp
86 KREDER, Raymond NED Garmin-Sharp +1:50
87 VAN SUMMEREN, Johan BEL Garmin-Sharp +1:52
88 SANZ, Enrique ESP MOVISTAR +1:55
89 VAN POPPEL, Boy NED VACANSOLEIL-DCM +1:57
90 POZZATO, Filippo ITA LAMPRE - ISD +1:59
91 BENNATI, Daniele ITA Saxo Tinkoff +2:07
92 BOUCHER, David FRA FDJ-BIG MAT +2:09
93 ISAICHEV, Vladimir RUS KATUSHA
94 BODNAR, Maciej POL Cannondale Pro Cycling +2:10
95 HABEAUX, Gregory BEL ACCENT JOBS - WILLEMS VERANDA'S +2:15
96 WACKERMANN, Luca ITA LAMPRE - ISD +2:20
97 NAPOLITANO, Danilo ITA ACCENT JOBS - WILLEMS VERANDA'S +2:23
98 SCHEIRLINCKX, Staf BEL ACCENT JOBS - WILLEMS VERANDA'S +2:25
99 GRUZDEV, Dmitriy KAZ ASTANA +2:28
100 WILLEMS, Frederik BEL LOTTO BELISOL +2:39
101 BRESCHEL, Matti DEN Saxo Tinkoff +2:45
102 VANDOUSSELAERE, Sven BEL TOPSPORT VLAANDEREN - MERCATOR +2:55
103 TUFT, Svein CAN ORICA-GREENEDGE +2:58
104 VAN EMDEN, Jos NED Belkin +3:01
105 VERRAES, Benjamin BEL ACCENT JOBS - WILLEMS VERANDA'S +3:10
106 MARANGONI, Alan ITA Cannondale Pro Cycling +3:12
107 DE VREESE, Laurens BEL TOPSPORT VLAANDEREN - MERCATOR +3:24
108 RASMUSSEN, Alex DEN Garmin-Sharp
109 ROJAS GIL, Jose Joaquin ESP MOVISTAR +3:29
110 VEUCHELEN, Frederik BEL VACANSOLEIL-DCM +3:40
111 BAGDONAS, Gediminas LTU AG2R LA MONDIALE +3:55
112 MADRAZO RUIZ, Angel ESP MOVISTAR +3:57
113 VANLANDSCHOOT, James BEL ACCENT JOBS - WILLEMS VERANDA'S +4:02
114 DE KORT, Koen NED ARG
115 JÖRGENSEN, Jonas Aaen DEN Saxo Tinkoff +4:12
116 MOINARD, Amaël FRA BMC RACING +4:24
117 RAST, Grégory SUI Radioshack Leopard +4:29
118 MINGUEZ AYALA, Miguel ESP EUSKALTEL - EUSKADI +4:39
119 DOCKX, Gert BEL LOTTO BELISOL +4:44
120 JEANNESSON, Arnold FRA FDJ-BIG MAT +4:45
121 STEEGMANS, Gert BEL OMEGA PHARMA-QUICKSTEP +4:46
122 MOURIS, Jens NED ORICA-GREENEDGE +5:00
123 KUMP, Marko SLO Saxo Tinkoff +5:01
124 TIMMER, Albert NED ARG +5:02
125 HAYMAN, Mathew AUS SKY PROCYCLING +5:04
126 MIYAZAWA, Takashi JPN Saxo Tinkoff +5:09
127 DEBUSSCHERE, Jens BEL LOTTO BELISOL +5:12
128 PATERSKI, Maciej POL Cannondale Pro Cycling +5:15
129 VIGANO, Davide ITA LAMPRE - ISD +5:16
130 ANACONA GOMEZ, Winner COL LAMPRE - ISD +5:34
131 BOIVIN, Guillaume CAN Cannondale Pro Cycling +5:46
132 BOZIC, Borut SLO ASTANA +6:05
133 VAN GOOLEN, Jurgen BEL ACCENT JOBS - WILLEMS VERANDA'S +6:46
134 KITTEL, Marcel GER ARG +7:06
135 DODI, Luca ITA LAMPRE - ISD +7:07
136 VENTOSO ALBERDI, Francisco José ESP MOVISTAR +7:29
137 SMUKULIS, Gatis LAT KATUSHA +8:12
138 LIGTHART, Pim NED VACANSOLEIL-DCM +8:29
139 ABERASTURI IZAGA, Jon ESP EUSKALTEL - EUSKADI +8:39
140 TLEUBAYEV, Ruslan KAZ ASTANA +8:40
141 WALLAYS, Jelle BEL TOPSPORT VLAANDEREN - MERCATOR +8:50
142 MINARD, Sébastien FRA AG2R LA MONDIALE +8:55
143 APPOLLONIO, Davide ITA AG2R LA MONDIALE +9:13
144 LOPEZ GARCIA, David ESP SKY PROCYCLING +9:37
145 WIGGINS, Bradley GBR SKY PROCYCLING
146 HONDO, Danilo GER Radioshack Leopard +9:57
147 BOARO, Manuele ITA Saxo Tinkoff +10:16
148 VANGENECHTEN, Jonas BEL LOTTO BELISOL +10:39
149 COBO, José ESP MOVISTAR +11:55
150 GUARNIERI, Jacopo ITA ASTANA +12:18
151 HUNTER, Robert RSA Garmin-Sharp +12:39
152 TJALLINGII, Maarten NED Belkin +12:45
153 BROWN, Graeme AUS Belkin +13:51
154 BONO, Matteo ITA LAMPRE - ISD +14:29
155 VANDBORG, Brian DNK Cannondale Pro Cycling +15:22
156 KUCHYNSKI, Aliaksandr BLR KATUSHA +15:44
157 EISEL, Bernhard AUT SKY PROCYCLING +16:27
158 HUFFMAN, Evan USA ASTANA +17:09
159 KOCJAN, Jure SLO EUSKALTEL - EUSKADI +24:02
160 CORDEEL, Sander BEL LOTTO BELISOL +25:03
161 BOS, Theo NED Belkin DNF
162 DEVOLDER, Stijn BEL Radioshack Leopard DNF
163 NAVARDAUSKAS, Ramunas LTU Garmin-Sharp DNF