Correction: Formulations of poly(vinyl alcohol) functionalized silk fibroin nanoparticles for the oral delivery of zwitterionic ciprofloxacin

• Nguyen Thi Phuong Thao, 
• Ngoc Yen Nguyen, 
• Van Ben Co, 
• Luong Huynh Vu Thanh, 
• Manh Quan Nguyen, 
• Suchiwa Pan-On, 
• Duy Toan Pham