Dammit, the browser mangled my comment. Fixing: The authors included Chinese, Turkish and Slavic people. Not all of them could write well in English. And I d

Dammit, the browser mangled my comment. Fixing: The authors included Chinese, Turkish and Slavic people. Not all of them could write well in English. And I didn't even have to look at their names to guess nationality, because they would have English grammar mistakes that would make it clear what their native language was. I really resent paying 35 dollars for a PDF from a company that can't even do some copy editing to help such authors. Elsevier has no respect for the researchers or their readers.