TGFB3 and myalgic encephalomeyelitis/chronic fatigue syndrome: The results revealed that compared to the control group, TGFβ3 at a concentration of 5 ng/mL significantly increased the proliferation and migration rate of human CFs and the expression of collagen I and collagen III in human CFs; moreover, TGFβ3 at 10 and 50 ng/mL significantly attenuated the proliferation rate and migration rate of human CFs and inhibited the expression of collagen I and collagen III in human CFs (P < 0.05; Figure 2B,D‐F).