Myelofibrosis with myeloid metaplasia 的病理特徵是骨髓內有大量的collagen deposition，此種現象最可能由下列何者所導致？
TGF-β(transforming growth factor-β)
FGF (fibroblast growth factor)
EGF (epidermal growth factor)
CSF (colony-stimulating factor)
