generic cialis tadalafil Joshi, Mandip; Kotha, Sainath R; Malireddy, Smitha; Selvaraju, Vaithinathan; Satoskar, Abhay R; Palesty, Alexender; McFadden, David W; Parinandi, Narasimham L; Maulik, Nilanjana Molecular and cellular biochemistry 2014 Jan; 386 1 2 233 49