Shrestha, S. K.; Shrestha, S.; Rajkarnikar, R.; Malla, J.; Rayamajhi, S.; Bhattarai, S.; Sharma, L.; Bhusal, Y. Comparing Four Standard Sleep Questionnaires to Polysomnography to Predict Possibility of Obstructive Sleep Apnea and Its Severity. J Adv Intern Med 2021, 10, 33-37.