References References  Annex 1. Title  Annex  Entries should be formatted with the Vancouver style, i.e. numbered consecutively in order of appearance  in the text and listed in this section in numerical order. Each reference is only listed once. Numbers should  be in square brackets in the text. See https://en.wikipedia.org/wiki/Vancouver_system When referring to ECDC’s surveillance objectives and disease-specific surveillance objectives, it is  important to include appropriate references. Similarly, it would be informative to include references to  more information on the laboratory network in question. Text  Questionnaires used, terms of references, list of participating laboratories/countries, extra tables of data,  etc.  Text  * End of template document *  10 