Sickle cell disease in Sri Lanka: clinical and molecular basis and the unanswered questions about disease severity oleh Thamal Darshana, Dayananda Bandara, Upul Nawarathne, Udaya de Silva, Yasinta Costa, Kalavitigoda Pushpakumara, Sumithra Pathirage, Seuwandi Basnayake, Chamila Epa, Pradeepa Dilrukshi, Maheshaka Wijayawardena, Angela A. Anthony, Rexan Rodrigo, Aresha Manamperi, Frances Smith, Angela Allen, Stephan Menzel, David Rees, Anuja Premawardhena