TY  - RPRT
TI  - Multicentre studies and conflicting prevalence data.
AU  - W Aberer
AU  - H Holub
PY  - 1992
DO  - 10.1111/j.1600-0536.1992.tb05237.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1395628/
ID  - 1395628
ER  -