Hi, Sergiy:<br /><br />I have uploaded your edited document and hope that you find the suggestions helpful. If you have any questions, please send a message to me via Editor World.<br /><br />This was a well written and comprehensive study from which I learned a great deal. I'm not sure that I improved the document, but I carefully proofread it several times. Happily, with Track Changes you can accept or reject any or all edits quite easily.&nbsp;<br /><br />Thank you for submitting this excellent study.<br /><br />Best wishes - George<br /><br />I am usually available for editing between 6:00 am and 10:30 pm. If my status is set to unavailable, you can still send a message to me via Editor World.