I will soon be flying from Bogota to the USA and I need to take an antigen test at Bogota airport. Covid testing there is by appointment only and when I start the booking process I'm asked to select a laboratory: "CE_El Dorado Muestras Laboratorio A2", "CE_El Dorado Muestras Laboratorio B2" or "CE_El Dorado Muestras Laboratorio C2". I'm absolutely clueless what this means. Does anybody know what I should select? I used the following website to book https://saas.pacificmedicalsuite.com...ment.php/web/3 and I typed in a dummy passport number to be able to get to the page with a calendar of available appointments.