To band or not to band, is that the question... or the answer for sleeve gastrectomy?

I read with interest the manuscript entitled " Banded versus non-banded sleeve gastrectomy: 5-year results of a matched-pair analysis" from a reputed University hospital in Germany.1 The obvious weakness of this paper is that it is retrospective and non-randomized.
Source: Surgery for Obesity and Related Diseases - Category: Surgery Authors: Source Type: research