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Patient Education and Counseling > 2011 > 83 > 2 > 203-209
American Journal of Preventive Medicine > 1999 > 17 > 3 > 161-168
Patient Education and Counseling > 2011 > 83 > 2 > 203-209
American Journal of Preventive Medicine > 1999 > 17 > 3 > 161-168