Epidemiology and disease surveillance; public health, population health and global health; develop a protocol and conduct a Cochrane systematic review; health services research; literature reviews; evidence-based medicine; knowledge management; capacity building; design & conduct surveys; monitoring & evaluation; data management, analysis & interpretation; various skills including planning, organization, management, communication, presentation, teamwork & computer; course design; teaching & mentoring; supportive supervision; and building & promoting partnerships.