A survey of credentialing for ERCP in the United States
https://doi.org/10.1016/j.gie.2017.03.1530
How much pain relief do patients expect after cholecystectomy?
http://em.rdcu.be/wf/click?upn=KP7O1RED-2BlD0F9LDqGVeSMQmWdTq9BpXT-2FFE5lpsKp0-3D_RLjM3EiP19d2W-2BRyiC55StGEdECkMlY3fp4OuMSsuV6A6CyvAgFp7ZpI71eXSVN2jI7O7AlSUceKnPqeNH05tsIaS6TUlFcZUFcc82Z80Z5VbaXFsA09PjLjhtEe0RRGCSF7-2Br0mpAtjZLf3-2BCqRlUWCZXCeTVOR0tdfgf-2FUnxlDoZFCjoXduHYaRfC78Yn6u7-2FIfclrP4UR3k-2F70kMc9ivF2ILxjcv3eAlzsMDmdmD1T5th86GcjvyHrAB6rUxWVfKUA7wYX-2FzPVerSDDRR-2BQ-3D-3D