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  Indian J Med Microbiol
 

Figure 1: Paramedian sagittal oblique view. Note: The sacrum (arrowhead) is recognizable as a horizontal hyperechoic curvilinear structure, the L3-5 laminae (arrows) have the typical "sawtooth" appearance, and the erector spinae muscles (asterisk) are hypoechoic and lie superficial to the laminae. The images were obtained by means of a Sonoscape P50 Ultrasound (Sonoscape Europe s.r.l., Rome, Italy). The O2-O3 mixture was produced by means of a Multiossigen Medical 99IR generator (Multiossigen S.p.A., Gorle, Bergamo, Italy).

Figure 1: Paramedian sagittal oblique view. 
Note: The sacrum (arrowhead) is recognizable as a horizontal hyperechoic curvilinear structure, the L3-5 laminae (arrows) have the typical 2-O3 mixture was produced by means of a Multiossigen Medical 99IR generator (Multiossigen S.p.A., Gorle, Bergamo, Italy).">