these players are checked every year by doctors, they do heart tests and endurance tests and all that. it's not normal to just collapse and die when several doctors gave you an ok. i mean, zidane today admitted they gave them stuff when he was at juve. drugs in sports have gone way to deep. no one can be sure what happened in feher's case, but illegal substance use is a probability. and i'm not saying that with a mean attitude, some of these athletes dont even know what their coaches give them. sad but true. 
