X (11 abbreviations) X, multiplied by, times. XIP, x-ray in plaster. XLD, xylose lysine deoxycholate agar. XP, xeroderma pigmentosa. XR, x-ray. XRD, x-ray diffraction. XRN, X-linked recessive nephrolithiasis. XRT, radiotherapy. XT, exotropia. XX, female sex chromosome. XY, male sex chromosome.
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I
J
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L
M
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O
P
Q
R
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