Tomiko Koyama

Total Numbers of Undiagnosed Carriers of Hepatitis C and B Viruses in Japan Estimated by Age- and Area-Specific Prevalence on the National Scale

Junko Tanaka, Tomiko Koyama, Masaaki Mizui et al. · Intervirology · 2011 · 154 citations

Epidemiology of Hepatitis C Virus in Japan

Takashi Moriya, Tomiko Koyama, Junko Tanaka et al. · Intervirology · 1999 · 57 citations

Viral Persistence, Hepatology, Hepatitis C +14

Factors Related to Tooth Loss Among Community-Dwelling Middle-aged and Elderly Japanese Men

Ayumi Ando, Masaki Ohsawa, Yumi Yaegashi et al. · Journal of Epidemiology · 2013 · 56 citations · Full text

Associations of number of teeth with risks for all‐cause mortality and cause‐specific mortality in middle‐aged and elderly men in the northern part of <scp>J</scp>apan: the <scp>I</scp>wate‐<scp>KENCO</scp> study

Ayumi Ando, Kozo Tanno, Masaki Ohsawa et al. · Community Dentistry And Oral Epidemiology · 2014 · 40 citations

Poor self-rated health is significantly associated with elevated C-reactive protein levels in women, but not in men, in the Japanese general population

Kozo Tanno, Masaki Ohsawa, Toshiyuki Onoda et al. · Journal of Psychosomatic Research · 2012 · 35 citations

Metabolic Syndrome, Poor Self-rated Health, Chronic Disease +6