Chemical characterization of electronic cigarette refills (e-liquids) in Belgium, Barhdadi, Sophia, Canfyn Michael, Moens Goedele, Vanhee Celine, Desmedt Bart, Courselle Patricia, Rogiers Vera, Vanhaecke Tamara, and Deconinck Eric , 29th International Symposium on Pharmaceutical and Biomedical Analysis, 9/9/2018, Leuven, Belgium, (2018)