Evaluation of toxicity profile of kratom (Mitragyna speciosa Korth) decoction in rats by Hassan, Zurina, Singh, Darshan, Suhaimi, Farah Wahida, Chear, Nelson Jeng-Yeou, Harun, Norsyifa, See, Cheah Pike, Kaur, Gurjeet, Mat, Noorul Hamizah, Bakar, Siti Najmi Syuhadaa, Mohd Yusof, Nur Sabrina, Kasinather, Vicknasingam Balasingam, Chawarski, Marek C., Murugaiyah, Vikneswaran, Ramanathan, Surash