@misc{indiciae6a1532311ef4, title = {Change in frequency pattern in cluster headache induced by subcutaneous sumatriptan.}, author = {Vinod Kumar Gupta}, year = {2005}, doi = {10.1111/j.1526-4610.2005.05195\_2.x}, url = {https://pubmed.ncbi.nlm.nih.gov/16109129/}, note = {Source identifier: 16109129} }