title: Effectiveness of various methods of contact and reimbursement on response rates of pregnant women to a mail questionnaire.
mesh_terms: D003625:Data Collection; D005260:Female; D006801:Humans; D009042:Motivation; D010349:Patient Compliance; D011177:Postal Service; D011247:Pregnancy; D012201:Reward; D011795:Surveys and Questionnaires