Exploring syndrome differentiation using non-negative matrix factorization and cluster analysis in patients with atopic dermatitis. - Younghee Yun; Won-Mo Jung; Hyunho Kim; Bo-Hyoung Jang; Min-Hee Kim; Jiseong Noh; Seong-Gyu Ko; Inhwa Choi (Comput. Biol. Medicine, 2017)