Recruitment process, participation decisions and data collection. The study process started with recruitment of participants to the biobank. Based on their response to the invitation, individuals were classified as participants, nonresponders or refusers. Participants were asked to complete a mailed questionnaire, while refusers and nonresponders were recruited for a telephone interview. * Stratified by original and simplified consent form type. † The study protocol was for patients to receive a phone call reminder after 14 days. Due to staffing issues, not all patients received a call.