I need help from users with proficient English or native speakers Please, correct a grammar in this text, especially the positions of articles. Thanks. BA - is a bronchial asthma In 2013, the sale of drugs for treatment of BA amounted to USD 4.9 bilion worldwide. The sales are expected to be about USD 13.3 billion in 2023. The developed countries (USA, France, Germany, Italy, Spain, United Kingdom, Japan, China) have a considerable potential for the growth of this drug group, where the development of medicine has led to a significant rise of life expectancy and thus the increased number of people with BA. The market growth of drugs for treatment of BA disease projected for 2013-2017 related to the fact that currently about 15 potential molecules are under stage of clinical trials, which are expected to slow down the progression of BA disease. A significant increase in the volume of sales of this drug group is also projected for 2017-2023 due to expiration of patent protection for medicinal products such as donepezil developed by Pfizer, rivastigmine developed by Novartis and memantine by Lundbeck. The sales of drugs for treatment of nervous system disorders reached to RUB 5.8 billion in Russia in December 2015. Drugs for the treatment of nervous system disorders take the 4th place among pharmacological/therapeutic groups of the first level of the ATC classification system. The share on the OTC+Rx market constituded 11.24% ( according to the data for December 2015 ). The market potential is valuable, especially since there is no effective drug for BA to be found at the moment, and those drugs that have temporary therapeutic effects are imported. Furthermore, it is expected that the developed drug is to be used for treatment of dementias not of the Alzheimer's disease type, in particular for fronto-temporal dementia, senile dementia as well as for other neurodegenerative disorders (Partkinson`s disease). Thus, the newly developed effective drugs are supposed to gain market share of drugs for the treatment of BA, and their worldwide sales may reach between USD 1-2 billion in a year.