“…The foUowing factors are integral parts of the group contiact: (1) purpose of group therapy, (2) composition of the group, (3) role of the group therapist, (4) recorder, substitute recorder, and mechanical reproduction of meetings, (5) physical arrangements, (6) period of group therapy, (7) loss and addition of group members, (8) attendance of members, (9) fees, (10) drugs, physical illnesses, hospitalization and other therapies, (11) conversations, telephone calls, personal contacts, and meetings by group members outside of the regular stmctmred group therapy session, and (12) modffications of the group confract.…”