Dimensionality of the Pittsburgh Sleep Quality Index: a systematic review.
Md Dilshad ManzarAhmed S BaHammamUnaise Abdul HameedDavid Warren SpenceSeithikurippu R Pandi-PerumalAdam MoscovitchDavid L StreinerPublished in: Health and quality of life outcomes (2018)
Not applicable because this was a review of existing literature.