The effectiveness of health education on the knowledge level of soil transmitted Helminths infection signs and symptoms among Tsanawiyah students in Pacet, Cianjur = Efektivitas penyuluhan kesehatan terhadap tingkat pengetahuan murid madrasah Tsanawiyah di Pacet, Cianjur mengenai gejala infeksi soil transmitted Helminths (Fakultas Kedokteran Universitas Indonesia, 2012)