Severe Chronic Neutropenia International Registry 
A disease registry which was established in Australia, Canada, the European Community and the United States in March, 1994. Information for patients and families and health care providers.
http://depts.washington.edu/registry/Neutropenia Support Association
A look at this disorder with information about the blood, the causes, the different types, symptoms and the treatment.
http://www.neutropenia.ca
MedicineNet: Neutropenia
Presents the causes, normal and abnormal white blood cell counts, and conditions associated with the disorder.
http://www.medicinenet.com/neutropenia/article.htm
Drugs causing neutropenia or agranulocytosis
A list of various drugs that may cause neutropenia by MedicineWorld.org
http://medicineworld.org/physicians/hematology/neutropenia.html
Case Report of Agranulocytosis Induced by Vinpocetine
A case report about drug-induced agranulocytosis, which is a life-threatening disorder that leads to a selective profound granulocytopenia.
http://www.priory.com/med/vinpocetine.htm
eMedicine.com: Agranulocytosis
Medical presentation of agranulocytosis written by a specialist. Includes information about its causes, related mortality and morbidity, the appropriate treatment and links to other resources.
http://www.emedicine.com/med/topic82.htm
