1. Department of Pharmaceutical Technology; Faculty of Pharmaceutical Sciences; Prince of Songkla University; Hat Yai Songkla 90112 Thailand
2. School of Pharmacy; Walailak University; Thasala Nakhon Si Thammarat 80161 Thailand
3. Polymer Therapeutics Laboratory; Centro de Investigación Príncipe Felipe; Av Eduardo Primo Yúfera 3 46012 Valencia Spain