TY  - RPRT
TI  - Collecting saliva samples by mail.
AU  - J F Etter
AU  - T V Perneger
AU  - A Ronchi
PY  - 1998
DO  - 10.1093/oxfordjournals.aje.a009426
UR  - https://pubmed.ncbi.nlm.nih.gov/9457003/
ID  - 9457003
ER  -