Q. A 45-year-old male patient was admitted to the hospital yesterday with complaints of fatigue, weakness, and decreased urine output over the past month. His past medical history is significant for hypertension and type 2 diabetes mellitus, for which he takes lisinopril, metformin, and glipizide. He also has a history of recurrent nephrolithiasis. The patient smokes 1 pack of cigarettes per day and drinks alcohol occasionally. On physical examination today, he weighs 120 kg (265 lb), is 178 cm (5 ft 10 in) tall, BMI 38 kg/m2, blood pressure is 160/100 mm Hg, heart rate 70/min, respiratory rate 18/min, and oxygen saturation is 98 percent on room air. His cardiopulmonary assessment is unremarkable. You note bilateral edema in his lower extremities. You order a CT scan of his abdomen and pelvis, which shows a left-sided renal mass measuring 5 cm in diameter (see image). A subsequent biopsy of the renal mass is performed. Histological assessment reveals clear cell renal cell carcinoma. The patient has numerous concerns and questions. While counseling the patient, which of the following precipitating factors can you advise him is NOT linked to the development or progression of his diagnosis?