Two judges and a lawyer were yesterday called to testify by magistrates investigating alleged trial-fixing rings, just three days after another 16 people were charged in connection with the probe. Gerasimos Dionisatos, president of the administrative council of the Athens Court of First Instance, resigned upon hearing that he was being asked to give evidence about alleged bribe taking and breach of duty. Piraeus judge Anastassios Savvas and lawyer Ioanna Kosyvaki were also asked to testify. Savvas has been accused of breach of duty in connection with a case involving a surgeon who is alleged to have drugged his colleagues so he could operate on their patients. Kosyvaki is an associate of celebrity lawyer Sakis Kehayioglou. Meanwhile, an arrest warrant was issued yesterday for Manolis Niotis, a doctor at the Athens NIMTS hospital, who was charged in May with making false declarations to secure the early release of drug dealers on grounds of ill health. Authorities said that Niotis is abroad.