英語 から 日本語 医療 Randomised double blind study

Competing interest:AH, PM and TB were employed by XX. AA and CC have accepted fees from XX and DD for speaking. EE have accepted fees from XX for organising education.

XX is the name of sponser company、AH, PM etc are the names of physician, research coordinator and so on.The research was done in Norway.
What does 'speaking' mean in this context, interpreter?