Literature search:
The search engines such as “Google Scholar”, “Medline and PubMed”
were used by applying some search key terms; “Vitamin D Pakistan”,
“Vitamin D diseases Pakistan”, “Vitamin D deficiency Pakistan”,
“Vitamin D tuberculosis Pakistan”, “Vitamin D Children Pakistan”,
“Vitamin D rickets Pakistan”, Vitamin D Women Pakistan”, “Vitamin D
Cancer Pakistan” and “Vitamin D receptor SNPs Pakistan”.