Awaya, A.and Y. Kuroiwa. A Retrospective Study on the Relationship Between Annual Airborne Pollen Levels During Four Decades of 1975–2014 and Annual Occurrence of Ulcerative Colitis, Crohn's Disease, Primary Biliary Cirrhosis, Fulminant Hepatitis, Severe Acute Pancreatitis, Interstitial Pneumonia, Amyloidosis, Based on the National Registry Database of Specific Intractable Diseases in Japan. Open Access Text Pvt, Ltd., 2019, doi:10.15761/aeph.1000112.