@article{doi:10.1001/archinternmed.2009.246, author = {Hemilä H}, title = {VItamin d level, respiratory tract infections, and controlled trials}, journal = {Archives of Internal Medicine}, volume = {169}, number = {15}, pages = {1443}, year = {2009}, doi = {10.1001/archinternmed.2009.246}, URL = { + http://dx.doi.org/10.1001/archinternmed.2009.246}, eprint = {/data/Journals/INTEMED/22599/ilt0810_1443_1443.pdf} }