TY - GEN AU - Weiss,Scott T AU - Litonjua,Augusto A TI - Vitamin D, the gut microbiome, and the hygiene hypothesis. How does asthma begin? SN - 1535-4970 PY - 2015///0505 KW - Asthma KW - immunology KW - Dust KW - Humans KW - Hygiene KW - Hygiene Hypothesis N1 - Publication Type: Editorial; Comment UR - https://doi.org/10.1164/rccm.201501-0117ED ER -