A woman who follows a vegan diet is at risk for which of the following nutrient deficiencies?

Your patient is a 68-year-old male complaining of difficulty breathing for two days. He is sitting up, conscious, alert, and oriented and appears to be in mild respiratory distress. Physical examination reveals cool, dry, pink skin; he is thin with well-defined accessory muscles, and you note diffuse wheezing to all lung fields. HR = 102, BP = 136/96, RR = 20, SaO2 = 92%. The patient gives a 20-pack-a-year history of smoking. These findings are most typical of:

A) emphysema. B) asthma. C) chronic bronchitis. D) congestive heart failure.

Currently how many human platelet antigens (HPAs) have been identified?

a. 12 b. 18 c. 24 d. 32