Accessibility to safe and hygienic sanitation facilities and the prevalence of open-air defecation among the school going adolescents in rural Puducherry oleh Surabhi Gitika Priya, Jayalakshmy Ramakrishnan, Premkumar Ramasubramani, Jeby Jose Olickal, Sadhana Subramanian, Subitha Lakshminarayanan