Sadeghia M, Hosseinzadeh H. A Novel pH-Responsive Superabsorbent Hydrogel Based on Collagen for Ephedrine Controlled Release: Hydrogel for Ephedrine Controlled Release. Pakistan Journal of Scientific & Industrial Research [Internet]. 2013 Aug. 29 [cited 2025 Jun. 8];56(2):82-9. Available from: http://www.biostaging.pjsir.org/index.php/biological-sciences/article/view/157