Racial variation in the use of laparoscopic cholecystectomy in the Department of Veterans Affairs Medical System
1999 ◽
Vol 188
(6)
◽
pp. 604-622
◽
2009 ◽
Vol 87
(1)
◽
pp. 48-51
◽
1993 ◽
Vol 329
(9)
◽
pp. 621-627
◽
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