Only a small percentage of them blamed China's previous doping problems for raising foreign suspicions.
Sentences in previous doping trials have been light with a 15-month suspended jail sentence among the most severe punishments.
Efimova, 24, the reigning world champion, was banned by the IOC for having served a previous doping suspension.
Much to the barely-disguised disgust of the BBC commentators, who have mostly talked about her previous doping suspension.
Three riders were dropped last week; all are formerly prominent cyclists who have been implicated in previous doping investigations, including the American Tyler Hamilton.
In a previous doping case, the Peru midfielder Joel Sánchez was provisionally suspended when testing positive for the stimulant methylhexaneamine after a 1-1 draw in Bolivia last October.
The head of Russia's Olympic delegation said a leading wrestler had been cleared to fight at the Games despite a previous doping ban.
Track's international federation, the I.A.A.F., said it would pursue a lifetime suspension of Gatlin, who had a previous doping offense.
Four were withdrawn by the Russian Olympic Committee due to previous doping sanctions – Mikhail Dovgalyuk, Yuliya Efimova, Natalia Lovtcova, Anastasia Krapivina – while the other three were named in the recent McLaren report.
On Sunday, the International Olympic Committee decided against a blanket ban but said Russian athletes with previous doping violations or who were mentioned in the McLaren report on state-sponsored doping should not be allowed to compete.
