questionnaires, telephone interview, optional blood drawn
BehavioralInitial CGS Visit (All Prospective Participants)Clinical assessment (screening, family & personal history of CA, surgeries) 6 Month Follow-Up Phone Interview (Prospective) Follow-Up Questionnaire (prospective and retrospective) Retrospective Initial Interview Participants may also donate an additional blood, serum, saliva, urine, or stool sample for research, (in addition to the blood drawn for clinical testing) or for the sole purpose of research testing (in absence of clinical testing or prior external testing).