TY  - RPRT
TI  - [Gaining access--recruitment phase as a challenge].
AU  - Iren Bischofberger
AU  - Brigit Obrist van Eeuwijk
PY  - 2005
DO  - 10.1024/1012-5302.18.4.219
UR  - https://pubmed.ncbi.nlm.nih.gov/16128172/
ID  - 16128172
ER  -