I. Introduction
Analyzing the healthcare interventions received by a patient admitted in a hospital, the so-called “clinical pathways”, has gained more attention from researchers around the world [1]–[3]. The main reason is that extracting useful information from Electronic Health Records (EHR) aids to improve the quality of the health services. Following well-defined clinical pathways during the analysis of a patient's symptoms can bring important benefits, such as early diagnosis, which increases the likelihood of recovery and reduction of operating costs [2]. Clinical pathways are composed of several pieces of information: medical procedures, drug exposures, patient complaints, and procedure occurrences.