Kaneko, M., Ohta, R., Nago, N., Fukushi, M., & Matsushima, M. (2017). Correlation between patients’ reasons for encounters/health problems and population density in Japan: A systematic review of observational studies coded by the International Classification of Health Problems in Primary Care (ICHPPC) and the International Classification of Primary care (ICPC). BMC Fam Pract.

Kaneko, Makoto, Ryuichi Ohta, Naoki Nago, Motoharu Fukushi, و Masato Matsushima. "Correlation between Patients’ Reasons for Encounters/health Problems and Population Density in Japan: A Systematic Review of Observational Studies Coded By the International Classification of Health Problems in Primary Care (ICHPPC) and the International Classification of Primary Care (ICPC)." BMC Fam Pract 2017.

Kaneko, Makoto, et al. "Correlation between Patients’ Reasons for Encounters/health Problems and Population Density in Japan: A Systematic Review of Observational Studies Coded By the International Classification of Health Problems in Primary Care (ICHPPC) and the International Classification of Primary Care (ICPC)." BMC Fam Pract 2017.