Alzheimer's disease (AD) is a heterogeneous disorder that has a multifactorial etiology. No single factor can account for all cases by itself. Dietary surveys have shown that the elderly often have low intakes of vitamins and that their plasma or red blood cell folate levels are often low. Low blood levels of other nutrients like vitamin C, thiamine and 25-hydroxycholecalciferol have also been found to be common.
The patient–doctor relationship is central to medicine. This relationship has two fundamental components (Calman and McLean, 1984). The first is the doctor's care, skill and knowledge; the second is information-giving to help the individual make decisions. Hence, communication and trust are essential in this relationship.
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