Acknowledgements
The authors would like to thank Hiroaki Tanaka of Oami Municipal Hospital, Akira Hara of Chiba Rosai Hospital, Masayuki Koizumi of Asahi Hospital, Shinichi Ozawa of Funabashi Central Hospital, Hideki Tsujimura of Chiba Cancer Center, and Kazuhisa Fujikawa of Narashino Saiseikai Hospital for follow-up of the patients.
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article at www.informahealthcare.com/lal.
Supplementary material available online
Supplementary Table 1 showing further data