A simple definition: A web service is a function that can be accessed by other programs over the web (Http). To clarify a bit, when you create a website in PHP that outputs HTML its target is the browser and by extension the human being reading the page in the browser.
Although a lack of dietary iodine is the main cause of goiter in many parts of the world, this is not often the case in countries where iodine is routinely added to table salt and other foods. 1  Graves' disease. 2  Goiter can sometimes occur when your thyroid gland produces too much thyroid hormone (hyperthyroidism). Goiter can sometimes occur when your thyroid gland produces too much thyroid hormone (hyperthyroidism). 2  In Graves' disease, antibodies produced by your immune system mistakenly attack your thyroid gland, causing it to produce excess thyroxine.
â¢ Most cases of pernicious anemia are due to autoimmune disease (see Autoimmune Disease). It may be associated with other autoimmune diseases, particularly thyroid disease, Addisonâs disease and vitiligo (loss of skin pigmentation).nemia is a deficiency in red blood cells. Iron, B12 and folic acid are required to produce red blood cells. Pernicious anemia is a condition in which there is thinning of the lining of the stomach with a subsequent lack of production of a substance called intrinsic factor.