title: Planning in case control studies: A comment on the relationship between lung function and indoor air pollution among rural women in the Niger Delta region of Nigeria.
authors.affiliation: Department of Community Medicine, Indira Gandhi Medical College, Shimla, Himachal Pradesh, India. E-mail: kanicak8@gmail.com.
authors.forename: Kanica
authors.initials: K
authors.lastname: Kaushal