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The flowchart of the study design (reproduced from Zhu et al. (2015), under the Creative Commons Attribution License/public domain). NZW = New Zealand White rabbits; ON = osteonecrosis; LPS = Lipopolysaccharide; MPS = methylprednisolone; GC = the control group; GL = the LIPUS group; GM = the MUS group; sp. = specimen.
