TY  - RPRT
TI  - Two-Stage sampling designs for gene association studies.
AU  - Duncan Thomas
AU  - Rongrong Xie
AU  - Mulugeta Gebregziabher
PY  - 2004
DO  - 10.1002/gepi.20047
UR  - https://pubmed.ncbi.nlm.nih.gov/15543639/
ID  - 15543639
ER  -