Center for Biomedical Informatics, Harvard Medical School, 10 Shattuck Street, Boston, MA 02115, Department of Pathology, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215, USA and Department of Biology, Mohammed V University-Agal, 4 Ibn Battouta Avenue, Rabat B.P:1014RP, Morocco Center for Biomedical Informatics, Harvard Medical School, 10 Shattuck Street, Boston, MA 02115, Department of Pathology, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215, USA and Department of Biology, Mohammed V University-Agal, 4 Ibn Battouta Avenue, Rabat B.P:1014RP, Morocco.