help me write a research paper with citations to scientific papers about the causes of lower back pain, taking into account four different notions of cause. 1) Proximate cause — what are the immediate physiological mechanisms responsible for lower back pain. 2) Developmental cause — how does lower back pain emerge over the lifetime of an individual, what factors contribute, etc. 3) Evolutionary cause — what did evolution leave us as a species vulnerable to lower back pain. 4) Phylogenetic cause — how does an understanding of phylogeny contribute to our understanding of why humans suffer lower back pain?
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