![Validity of a Questionnaire for Periodontitis Screening of Japanese Employees]()
Validity of a Questionnaire for Periodontitis Screening of Japanese EmployeesYamamoto, Tatsuo; Koyama, Reiko; Tamaki, Naofumi; Maruyama, Takayuki; Tomofuji, Takaaki; Ekuni, Daisuke; Yamanaka, Reiko; Azuma, Tetsuji; Morita, Manabu · Journal of Occupational Health · 2009