Use of key contacts to increase response rates.
Kelly
R B
RB
Velez-Holvino
O
O
D001291:Attitude of Health Personnel; D003625:Data Collection / Q000379:methods*; D005180:Faculty, Medical; D006801:Humans; D007396:Internship and Residency; D010821:Physicians, Family / Q000193:education / Q000523:psychology*; D013689:Telephone