Andina Setyawati1, - and Dr; Ariyanti Saleh2, - and Prof Dr; Takdir Tahir, - and Dr; Saldy Yusuf1, - and Dr; Syahrul Syahrul1, - and Aminuddin Aminuddin, - and Dr; Muhammad Raihan, - and Nuurhidayat Jafar, - and Hasyrul Hamzah, - and Nur Arfian, - Matrix Metalloproteinase-9 Testing of Golden Rice Cookies With Piper Crocatum Active Extract for Preventing Foot Ulcers in Patients With Diabetes: Protocol for a Randomized Controlled Trial. JMIR Res Protoc 2024 | vol. 13 | e49940 | p. 1.