Fig. 1
From: Board certification and urban–rural migration of physicians in Japan
Dynamics of new/lost board certification from 2012 to 2014. The numbers of newly board-certified physicians (black bars) and physicians losing their board certification (white bars) from 2012 to 2014 are presented by years of experience since registration as a physician as of 2014. New board certification peaked at 1888 in the 7th year and gradually declined with further experience. Loss of certification peaked at 304 in the 27th year but showed a gentler slope than that for new certification