Table 2. Main issues from CTA interview results.

Organizational factors (reflecting PARIHS and HIT sociotechnical context of work)	• Underutilization of pharmacists • Concern about interfering with plans of cardiologist or private specialist • Uncertainty and inconsistency about approved β-blockers on formulary • Shortage of time and staff for chronic care management and titration
Patient factors and clinical data (reflecting PARIHS and HIT sociotechnical content of work)	• Impact of β-blockers on patient functional capacity • Lack of patient stability • Important clinical data to consider in decision (includes age, comorbidities, cardiac functioning)
Provider knowledge, skills, attitudes (reflecting Cabana framework)	• Risk or difficulty threshold of when to refer to specialist • Partial understanding of rationale for guideline • Positive opinion about clinical guidelines in general

Abbreviations: CTA, cognitive task analysis; HIT, health information technology; PARIHS, Promoting Action on Research Implementation in Health Services.