K. Ivanova
发表
Ulrike Dapp,
Matthias Egger,
Danielle Harari,
2007,
BMC medical research methodology.
M. Egger,
S. Iliffe,
A. Stuck,
2006
.
Steve,
Rickey E Carter,
K. Brady,
2003
.
Steve,
M. Egger,
S. Iliffe,
2022
.