What type of crystal system is shown in the figure below?

Identify the crystals seen in this urine sediment with a pH of 8.  

Patients with the P1 phenotype:

Which type of hypersensitivity reactions are IgE mediated and occur withing 15-60 minutes of exposure?  Hay fever and anaphylaxis are two examples of this type of reaction.

A 57-year-old male was evaluated by his physician for pain in the sacroiliac joints and inflammation noted in the eyes.  A genetic evaluation was performed, and the patient was noted to be positive for HLA-B27.  What is the most likely diagnosis?

A patient with hemolytic anemia will:

Hypokalemia may be caused by:

Which of the following is true for autologous donations?

Leukoreduced red cells containing AS-1 (Adsol) are stored for:

Antibody to which of the following antigens is the most commonly found platelet antibody?