Psychotherapy with LSD was used at Modum Bads Nervesanatorium (MBN) from 1961, and In 968 a questionnaire was sent out to the first 300 patients treated, in which they were to state results and experience of the treatment, psychic condition, and treatment after the hospitalization at MBN. Because the question whether LSD influenced the chromosomes was topical at that time, a major part of the...