Human Angiotensin I-Converting Enzyme Produced by Different Cells: Classification of the SERS Spectra with Linear Discriminant Analysis oleh Irina Boginskaya, Robert Safiullin, Victoria Tikhomirova, Olga Kryukova, Natalia Nechaeva, Naida Bulaeva, Elena Golukhova, Ilya Ryzhikov, Olga Kost, Konstantin Afanasev, Ilya Kurochkin