From a press release issued by the FIM:

Mies, June 12 2003

Superbike & Supersport World Championships
Anti-doping Controls

Anti-doping controls were carried out at the round of the Superbike and Supersport World Championships held at the circuit of Oschersleben, Germany, on June 1st.

All the samples tested showed the absence of any banned substances.

The riders controlled were : Neil Hodgson (GBR, Superbike), Régis Laconi (FRA, Superbike), Steve Martin (AUS, Superbike); Jörg Teuchert (GER, Supersport), Broc Parkes (AUS, Supersport), Katsuaki Fujiwara (JPN, Supersport).