Although stress is a cause of baldness, it is seen only as a contributing factor, because there is one cause that affects most hair loss sufferers.

虽然强调的是引起脱发，这是被仅仅视为是一个促进因素，因为有一个原因影响到大多数脱发患者。

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Other factors, such as a history of malignant melanoma and red hair, a risk factor for melanoma, were recorded.

恶性黑色素瘤病史、红色头发（黑色素瘤的一个风险因素）等其他因素也被记录下来。

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Objective To observe the growth kinetics of dermal papilla cells and dermal sheath cells from human hair follicles in vitro and the effect of epidermal growth factor (EGF) on them.

目的观察人正常头皮毛囊真皮成分的细胞体外培养的生长繁殖曲线及表皮细胞生长因子对它们的影响。

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Although it is understandably tight-lipped about the exact mechanism behind its success, one probably enlists the help of cells called keratinocytes, which interact naturally with the dermal papilla cells of the hair follicle and secrete a chemical factor that supports their growth.

ECONOMIST: A cure for baldness