VWF and lymphangioleiomyomatosis: Using ELISA to detect and validate levels of vWF in LAM serum and healthy control serum it was found that mean vWF in LAM was 3754±554.2 u/mL (n = 15) compared to 6254±527.7 u/mL in healthy controls (n = 10, p = 0.036, Fig. 2B).