Seasonal affective disorder:

A) occurs in the winter months. B) can be treated with phototherapy.
C) is a cyclical form of depression. D) all of the above.

D

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________ prevents the clotting of blood

a. Bile b. Fibrinogen c. Heparin d. Blood protein

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Cannulated screws and nails are designed to follow the path created by a:

a. depth gauge b. guide pin c. pilot drill d. reamer

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