Additional file 1: of Respiratory health effects of exposure to low levels of airborne endotoxin – a systematic review

Supplement 1. Pubmed search strategy. Supplement 2. Study incentives and other airborne exposures found to be associated with the outcome variables. Table S2. Study incentives and other airborne exposures found to be associated with the outcome variables. Supplement 3: Quality Assessment of included studies. Table S3. Quality Assessment of included studies based on the NIH Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies. Supplement 4. Results tables Table S4.1. Overview of results – questionnaire outcomes among subjects exposed to bioaerosols. Table S4.2. Overview of results – spirometry outcomes among subjects exposed to bioaerosols. Table S4.3. Overview of results – exposure-response relationships between endotoxin exposure and respiratory outcomes. Table S4.4 Analysis of effects of endotoxin exposure on respiratory health in subgroups. Supplement 5: Best evidence synthesis. (DOCX 56 kb

Human artistic behaviour: adaptation, byproduct, or cultural group selection?

Evolutionary accounts of art fall naturally into two categories: those that propose that art is an adaptation, and those that propose it is a byproduct of adaptations which evolved for different purposes. Although each of these positions can be supported by a wide range of empirical evidence, we will argue that there are shortcomings in each type of explanation. We will propose the alternative that the earliest art arose as a product of cultural group selection, drawing on theoretical models of altruism, anthropological observations of the use of art in extant small-scale societies and archaeological findings from Upper Palaeolithic Europe, in particular the Magdalenian cultural complex