R. Langan
发表
Stuart A. Pizer,
S. Mitchell,
Jack Engler,
2013
.
R. Langan,
Andrew J Goodbred,
Robert Langan,
2016,
American family physician.
R. Langan,
Robert Langan,
2019,
Primary care.
Robert C Langan,
Patricia B Gotsch,
Michael A Krafczyk,
2007,
American family physician.
R. Langan,
Andrew J Goodbred,
Robert Langan,
2017,
American family physician.
R. Langan,
Paula Bordelon,
Maria V Ghetu,
2009
.
Sven Kunisch,
Markus Menz,
R. Langan,
2020
.
R. Langan,
Kristen Jones,
Robert Langan,
2015,
American family physician.
Markus Menz,
Ryan Krause,
R. Langan,
2022,
Journal of management.
R. Langan,
Paula Bordelon,
Maria V Ghetu,
2009,
American family physician.
R. Langan,
Robert Langan,
2019,
American family physician.
R. Langan,
P. Gotsch,
N. Lam,
2010,
American family physician.
R. Langan,
Robert Langan,
1995
.
R. Langan,
Michael A. Krafczyk,
David Skillinge,
2011
.
R. Langan,
Robert Langan,
2014,
The American Journal of Psychoanalysis.
R. Langan,
2014,
The American Journal of Psychoanalysis.
R. Langan,
Robert Langan,
1997
.
R. Langan,
Kimberly J Zawistoski,
Robert Langan,
2011,
American family physician.
R. Langan,
Robert Langan,
2004,
The Journal of the American Board of Family Practice.