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  Indian J Med Microbiol
 

Figure 1: Measurement of head tilt using a goniometer: One arm is lined up with the vertical edge of the door while the other is aligned across the medial and lateral canthus of each eye

Figure 1: Measurement of head tilt using a goniometer: One arm is lined up with the vertical edge of the door while the other is aligned across the medial and lateral canthus of each eye