https://www.selleckchem.com/products/abt-199.html The difficult airway is an important scenario in anaesthesia due to the impact of its potential complications, and the difficulty in predicting its presence in current clinical practice. Systematic review of articles in English and Spanish retrieved from MEDLINE (Ovid), LILACS and Embase up to March 2018. The search strategy was defined by the authors. The reviewers uploaded the studies to specially designed tables in order to qualitatively analyse the results of each paper. A total of 3602 studies were identified. Thirty-four of these were included in the qualitative review. The most commonly used definition of difficulty was the Cormack-Lehane3 or 4 classification, with a weighted mean incidence of 7.23%. The most relevant finding was the methodological weaknesses in obtaining these scales. Available prediction models show limited discrimination, and weaknesses were detected in the methodology used to develop these prediction rules. Available prediction models show limited discrimination, and weaknesses were detected in the methodology used to develop these prediction rules.Cyanobacteria are emerging as a popular system in both basic and applied microbial research. However, the incomplete understanding of their molecular biology hinders their practical applications in the industrial, agricultural, and environmental sectors. We present the potential of recently developed omics approaches to obtain deeper insights into cyanobacterial molecular physiology. Photogrammetry technology has been used for the digitalization of multiple dental implants, but its trueness and precision remain uncertain. The purpose of this invitro investigation was to compare the accuracy (trueness and precision) of multisite implant recordings between the conventional method and a photogrammetry dental system. A definitive cast of an edentulous maxilla with 6 implant abutment replicas was tested. Two different recording methods were compared,