Effectiveness of a nutritional mobile application for management of hyperphosphatemia in patients on hemodialysis: a multicenter open-label randomized clinical trial by Lee, Fang Teong, Ban, Hock Khor, Hi, Ming Ng, Sahathevan, Sharmela, Purba, Kristo Radion, Narayanan, Sreelakshmi Sankara, Abdul Gafor, Abdul Halim, Bak, Leong Goh, Boon, Cheak Bee, Yahya, Rosnawati, Bavanandan, Sunita, Wahab, Zaimi, Aqashiah Mazlan, Sadanah, Chinna, Karuthan, Morad, Zaki, Mat Daud, Zulfitri Azuan, Karupaiah, Tilakavati