M Martini
Faculty of Public Health, Diponegoro University, Semarang, Central Java, Indonesia

Yuniar Triasputri
* Corresponding Author
Faculty of Public Health, Diponegoro University, Semarang, Indonesia

Retno Hestiningsih
Faculty of Public Health, Diponegoro University, Semarang, Indonesia

Sri Yuliawati
Faculty of Public Health, Diponegoro University, Semarang, Indonesia

Susiana Purwantisasi
Faculty of Matematics and Science, Diponegoro University, Semarang