It's a very strange paper. There is a core that is competently done; it's a review of the various functions of the mitochondrion, and 90% of it is useful, detailed stuff. It's a bit outside my field, but what I could follow seemed reasonable. But then…oh, man. Every once in a while, it just goes cockeyed and throws out these incredible non sequiturs, making bizarre assertions that are unjustified by the evidence. If Norman Bates were the author of this paper, I'd be able to tell you exactly which parts he wrote while wearing a dress. It's that freaky. In addition, the authors are not native English speakers, and occasionally, often at the same time the weird stuff is being trotted out, the language decays into incoherent babble.