A busy family physician, Dr. Tremblay, working at an urgent care clinic in Ottawa, sees a 3-year-old child, Liam, who presents with a persistent cough and fever for 48 hours. Liam's mother mentions he's been particularly lethargic. Dr. Tremblay, in a hurry due to a long waiting line, quickly diagnoses a presumed bacterial bronchitis and prescribes a broad-spectrum antibiotic, azithromycin, without accurately weighing Liam or confirming his precise age-appropriate dose. She recalls a standard dose for 'children' but omits the crucial weight-based calculation. Liam's mother fills the prescription and administers the medication. The next day, Liam develops severe nausea, vomiting, and prolonged QTc on an urgent ECG, requiring hospitalization. Subsequent review reveals that Liam received a significantly supra-therapeutic dose of azithromycin for his weight. This incident raises questions about the physician's conduct. Which of the following best describes the primary professional accountability Dr. Tremblay failed to uphold in this scenario?