Kılıç, Mehmet, et al. “Evaluation of Serum Salivary Levels of Carnosine and Cotinine in Recurrent Wheezing of Young Children With Passive Smoking”. The Turkish Journal of Pediatrics, vol. 63, no. 3, June 2021, pp. 404-16, https://doi.org/10.24953/turkjped.2021.03.007.