Huddled inside a tent in rebel-held northwestern Syria, Umm Khaled says she fears her baby will die unless she gets specialist treatment in neighbouring Turkey for a congenital heart defect. Seriously ill Syrians in the country's last rebel bastion of Idlib used to be able to access life-saving care across the border, but the main crossing for medical visits was slammed shut after a deadly earthquake. IMAGES AND SOUNDBITES