[It's possible to increase the response rate to postal questionnaires].
Eaker
Sonja
S
Institutionen för medicinsk epidemiologi, Karolinska institutet, Stockholm. Sonja.Eaker@mep.ki.se
D003625:Data Collection / Q000379:methods* / Q000592:standards / Q000706:statistics & numerical data; D006801:Humans; D011177:Postal Service; D011795:Surveys and Questionnaires / Q000592:standards*