Task: Answer Verification
Input (English): Question: Do athymic nude rats develop severe pulmonary hypertension following monocrotaline administration?
Answer: Athymic nude rats developed severer PH than euthymic rats along with a greater number of mast cells and severer histopathological changes, such as thickening of the alveolar wall. Mast cell proliferation was considered to play a pivotal role in the development of PH in MCT-PH.
Output (English): yes