Humagain M, Thapa S, Lamichhane S, Rijal AH, Neupane M, Koirala P. Association between Subjective Happiness and Periodontal Disease in Patients Visiting at a Tertiary Care Centre of Central Nepal. J Nepal Soc Perio Oral Implantol [Internet]. 2023 Dec. 31 [cited 2024 Nov. 23];7(1):3-7. Available from: https://nepjol.info./index.php/jnspoi/article/view/60881