Fig. 1From: Ten years of progress in the Hokkaido birth cohort study on environment and children’s health: cohort profile—updated 2013The geographical distributions of the collaborating hospitals in Hokkaido, Japan. The large circled dot indicates Sapporo city (the prefectural capital of Hokkaido). The black dots indicate the geographical distributions of the collaborating hospitals and clinics outside of Sapporo CityBack to article page