According to this article in VG
http://www.vg.no/sport/ski/artikkel.php?artid=3193748 (haven't found the original article in Helsingin Sanomat)
60% of the skiers in places 1-15 had abnormal blood values in that race in Kuopio November 2001. Scientist dr. Jim Stray-Gundersen was the source. VG said in the article that they had failed to get in contact with Stray-Gundersen before the article was published. It's quite amazing that they didn't do a follow up of this sensational stuff!
VG said it was unclear if Helsingin Sanomat meant only the men’s race or both the women’s 10K and men’s 15K. Women’s race was won by Bente Skari with another 3 Norwegian ladies making it into the top 15, among them Marit Bjoergen.
For Sweden and Elofsson this start of the World Cup season 2001 was a big shock. The Olympics in Salt Lake was coming up in a few months and to see this Norwegian dominance must have been devastating for the self-confidence. For the Norwegians this race was extremely important. To just make it into the Olympic team you had to deliver in the opening WC race, and so they did!
1 AUKLAND Anders 1972 NOR 38:55.0 0.00
2 JEVNE Erling 1966 NOR 39:03.3 +8.3
3 ESTIL Frode 1972 NOR 39:28.3 +33.3
4 HJELMESET Odd-Bjoern 1971 NOR 39:49.7 +54.7
5 SKJELDAL Kristen 1967 NOR 39:57.8 +1:02.8
6 ALSGAARD Thomas 1972 NOR 40:00.8 +1:05.8
7 BJONVIKEN Tore 1975 NOR 40:02.9 +1:07.9
8 BJERVIG Espen 1972 NOR 40:04.0 +1:09.0
9 ELOFSSON Per 1977 SWE 40:05.6 +1:10.6
10 MUEHLEGG Johann 1970 SPA 40:08.3 +1:13.3
11 REPO Sami 1971 FIN 40:20.4 +1:25.4
12 MAE Jaak 1972 EST 40:20.6 +1:25.6
13 ROTCHEV Vassili 1980 RUS 40:23.2 +1:28.2
14 IVANOV Mikhail 1977 RUS 40:25.3 +1:30.3
15 FREDRIKSSON Mathias 1973 SWE 40:29.6 +1:34.6