TY  - RPRT
TI  - Randomized concentration-controlled trials: motivations, use, and limitations.
AU  - Holger Kraiczi
AU  - Theo Jang
AU  - Thomas Ludden
AU  - Carl C Peck
PY  - 2003
DO  - 10.1016/s0009-9236(03)00169-3
UR  - https://pubmed.ncbi.nlm.nih.gov/12966364/
ID  - 12966364
ER  -