The utility of drug checking services as monitoring tools and more: A response to Pirona et al. - Giné, C.; Vilamala, M.; Measham, F.; Brunt, T.; Bücheli, A.; Paulos, C.; Valente, H.; Martins, D.; Libois, B.; Tögel-Lins, K.; Jones, G.; Karden, A.; et al. (Elsevier BV, 2017)