Screened participants were given a moderately high dose of 20mg/70kg (perhaps 4.5 grams mushrooms for a 70kg person) and a week and a half later were given a high dose of 30mg/70kg (perhaps 6.7 grams / 70 kg).
"These data expand the findings of previous studies involving patients
with cancer and depression as well as patients with treatment-resistant
depression by suggesting that psilocybin may be effective in the much
larger population of MDD. Further studies are needed with active
treatment or placebo controls and in larger and more diverse
populations."