Erectile Dysfunction Causes and Symptoms. There are many causes of erectile dysfunction (impotence) and some include: 1  blood vessel diseases (such as peripheral vascular disease and others), 2  systemic disease, 3  hormonal imbalance, and. 4  medications (such as blood pressure and heart medications).
For the martial arts rank of Nidan, see Dan (rank). Nidan (sometimes known as Midan or Idan) was a Welsh priest and, according to some sources, a bishop, in the 6th and 7th centuries. He is now commemorated as a saint.
Niani is often considered one of the ancient capitals of the Mali Empire and the birthplace of emperor Sundiata Keita. Some scholars believe that the village became the capital in the early 12th century after the former capital of Dioliba became abandoned. Niani is mentioned by the 16th-century traveller Leo Africanus.