Development of blood hemoglobin level early detection device based on a noninvasive optical platform oleh Irzaman, Yaya Suryana, Sabar Pambudi, Tika Widayanti, Renan Prasta Jenie, Bayu Prastowo, Nazopatul Patonah Har, Vania Rahmawaty, Muhammad Dahrul, Aminullah, Ade Kurniawan, Ridwan Siskandar, Ichsan Hardyanto, Johan Iskandar, Naufal Muharram Nurdin, Arga Ardidarma, Sri Kristiana Rahayu, Husin Alatas