Acknowledgments
This work was supported by a grant from the Practical Research Project for Rare/Intractable Diseases [16ek0109098] from Japan Agency for Medical Research and Development, AMED, as well as a grant from the Ministry of Education, Culture, Sports, Science, and Technology of Japan [15K09468].
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article online at https://doi.org/10.1080/10428194.2017.1387902.