Do you use skin prick testing wheal size/grade or serum IgE levels when deciding what dose of allergen immunotherapy to start a patient on?  

Generally, regardless of degree of sensitization, I start my patients' immunotherapy with 1:1000 dilution and build up to 1:1 over several months. However, I may consider degree of sensitization when writing the extract prescription. I typically dose in the lower range for allergens with milde...