ELIZA

return kwic search for while out of >500 occurrences
341393 occurrences (No.55 in the rank) during 5 years in the PubMed. [no cache] 500 found

274) Among these, 17 cases involved native grafts/patches (12 grafts and 5 patches), while 55 cases involved non-native grafts/patches [26 polytetrafluorethylene (PTFE) grafts and 24 Dacron grafts (Haemashield, Meadox Medical, Boston Scientific Corporation, Natick, NY; Gelsoft graft, Vascutek, Inchinnan, Renfrewshire, Scotland, UK; Intervascular, Mahwah, NJ); INVISTA, and 5 Vascu-Guard(™) bovine pericardial patches; Synovis Surgical Innovation].

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[frequency of next (right) word to while]

(1)79 the	(16)3 it	(31)2 environmental	(46)2 promoting
(2)14 in	(17)3 its	(32)2 focusing	(47)2 providing
(3)13 no	(18)3 most	(33)2 for	(48)2 receiving
(4)11 a	(19)3 others	(34)2 further	(49)2 serum
(5)6 this	(20)3 that	(35)2 harvesting	(50)2 she
(6)4 at	(21)3 there	(36)2 increasing	(51)2 significant
(7)4 maintaining	(22)3 these	(37)2 minimising	(52)2 similar
(8)4 one	(23)3 those	(38)2 much	(53)2 slightly
(9)4 performing	(24)3 women	(39)2 negative	(54)2 some
(10)4 reducing	(25)2 Asians	(40)2 numerous	(55)2 still
(11)4 retaining	(26)2 accounting	(41)2 on	(56)2 subcutaneous
(12)4 simultaneously	(27)2 also	(42)2 other	(57)2 their
(13)4 they	(28)2 controlling	(43)2 participants
(14)4 using	(29)2 digging/gardening,	(44)2 preserving
(15)3 20%	(30)2 downregulation	(45)2 previous

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--- WordNet output for while --- =>時間と労働, その間に, 時間, する間に, なのに, そのうえ, をのんびりと過す Overview of noun while The noun while has 1 sense (first 1 from tagged texts) 1. (23) while, piece, spell, patch -- (a period of indeterminate length (usually short) marked by some action or condition; "he was here for a little while"; "I need to rest for a piece"; "a spell of good weather"; "a patch of bad weather") --- WordNet end ---