Public repositories: users reluctant to give materials.
Roderick A F
RA
MacLeod
Hans G
HG
Drexler
D018070:Biological Specimen Banks / Q000592:standards* / Q000706:statistics & numerical data*; D002460:Cell Line; D045744:Cell Line, Tumor; D030881:Disclosure; D006801:Humans; D017150:Public Sector; D015203:Reproducibility of Results; D012106:Research / Q000592:standards; D012108:Research Personnel / Q000592:standards*