TY  - RPRT
TI  - Differences in volunteer and randomly acquired samples.
AU  - M E Wewers
AU  - K Ahijevych
PY  - 1990
DO  - 10.1016/s0897-1897(05)80140-5
UR  - https://pubmed.ncbi.nlm.nih.gov/2252405/
ID  - 2252405
ER  -