Aromatase inhibitor. Aromatase inhibitors (AIs) are a class of drugs used in the treatment of breast cancer in postmenopausal women and gynecomastia in men. They may also be used off-label to reduce increase of estrogen conversion during cycle with external testosterone. They may also be used for chemoprevention in high risk women.
Supporters of the Keystone XL Pipeline herald it as a job-creating machine, producing as many as 119,000 jobs. But only 3,900 workers will actually be required to build the pipeline to carry oil from Canada to the Gulf of Mexico, according to the U.S. State Department, and those jobs will only last for a year. There will be 35 permanent positions created.
The Keystone XL pipeline is a proposed 1,179-mile (1,897km) pipe that would run from the oil sands in Alberta, Canada, to Steele City, Nebraska, where it could join an existing pipe.It could carry 830,000 barrels of oil each day.he proposed XL pipeline has the same origin and destination as an operational pipe, also called Keystone-granted presidential permit in 2008 by President George W Bush-but takes a more direct route. The XL pipeline would allow for an increased supply of oil from Canada.