1. Who is an oncologist ?
2. Allergic reactions are caused by antibodies of which group?
http://www.thefreedictionary.com/oncologist
http://www.emedicinehealth.com/allergic_reaction/page2_em.htm
2. Allergic reactions are caused by antibodies of which group?
http://www.emedicinehealth.com/allergic_reaction/page2_em.htm