Improved genetically encoded near-infrared fluorescent calcium ion indicators for in vivo imaging. oleh Yong Qian, Danielle M Orozco Cosio, Kiryl D Piatkevich, Sarah Aufmkolk, Wan-Chi Su, Orhan T Celiker, Anne Schohl, Mitchell H Murdock, Abhi Aggarwal, Yu-Fen Chang, Paul W Wiseman, Edward S Ruthazer, Edward S Boyden, Robert E Campbell