Renske Blom is a psychiatrist at GGZ Centraal/UMC Utrecht. She is involved in the RCT: “the effect of psilocybin on treatment resistant depression”. She worked as the Sub-I in the trial for a year and is currently participating as a chaperone, guiding participants under the influence of psilocybin. She is most interested in the therapeutic effect of psychedelics. During her medicine-study, she studied the effect of MDMA on hyponatremia and was involved in the peer-education program (Unity), educating drug users about the effects of illicit drugs at dance-parties and festivals. She is currently still involved as a physician, advising drug users about the do’s and don’t of (illicit) drug use in combination with other drugs, medication or psychiatric disease.