Excluding tаking а histоry аnd/оr perfоrming a physical examination, including collection of blood and urine for a minimum database, all of which help to determine the clinical signs and any evidence of exposure to toxicants associated with a given suspected "intoxication," which of the following is generally the NEXT step in the process of working up a known or possible intoxication, especially when clinical signs are being exhibited? NOTE: The order in which different procedures are performed in the case of a known or possible "intoxication" can vary, depending on a number of factors, most notably the health status of the patient, as well as the toxicity and exposure dosage of the toxicant. For this question, assume you have time to start the initial work up of this case and develop an appropriate management strategy while you potentially gather more information.