|
BMC Medical Research Methodology ·
2018 ·
10.1186/s12874-017-0456-8
|
|
|
BMC Medical Research Methodology ·
2018 ·
10.5167/uzh-145727
|
|
|
BMC Medical Research Methodology ·
2018 ·
29321002
|
|
|
BMC Medical Research Methodology ·
2018 ·
PMC5763521
|