TY  - RPRT
TI  - Understanding controlled trials. Randomisation methods: concealment.
AU  - D J Torgerson
AU  - C Roberts
PY  - 1999
DO  - 10.1136/bmj.319.7206.375
UR  - https://pubmed.ncbi.nlm.nih.gov/10435967/
ID  - 10435967
ER  -