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Array ( [urn:ac.highwire.org:guest:identity] => Array ( [runtime-id] => urn:ac.highwire.org:guest:identity [type] => guest [service-id] => ajnr-ac.highwire.org [access-type] => Controlled [privilege] => Array ( [urn:ac.highwire.org:guest:privilege] => Array ( [runtime-id] => urn:ac.highwire.org:guest:privilege [type] => privilege-set [privilege-set] => GUEST ) ) [credentials] => Array ( [method] => guest ) ) [ef04f97b-2099-4906-992d-b5854ca8cea4] => Array ( [runtime-id] => ef04f97b-2099-4906-992d-b5854ca8cea4 [type] => toll-free-key [service-id] => ajnr-ac.highwire.org [access-type] => Controlled [privilege] => Array ( [32465b31-604e-41c4-95c3-f243af85635d] => Array ( [runtime-id] => 32465b31-604e-41c4-95c3-f243af85635d [type] => toll-free-key ) ) [credentials] => Array ( [method] => toll-free-key [value] => tf_ipsecsha;ebe292460461431afa66309723aeda8d76e27d7b ) ) ) 1naresh2nareshArray ( [urn:ac.highwire.org:guest:identity] => Array ( [runtime-id] => urn:ac.highwire.org:guest:identity [type] => guest [service-id] => ajnr-ac.highwire.org [access-type] => FreeToRead [privilege] => Array ( [urn:ac.highwire.org:guest:privilege] => Array ( [runtime-id] => urn:ac.highwire.org:guest:privilege [type] => privilege-set [privilege-set] => GUEST ) ) [credentials] => Array ( [method] => guest ) ) [ef5c945a-49bb-4463-9925-bfd98cfb8ea0] => Array ( [runtime-id] => ef5c945a-49bb-4463-9925-bfd98cfb8ea0 [type] => toll-free-key [service-id] => ajnr-ac.highwire.org [access-type] => FreeToRead [privilege] => Array ( [56f20e5f-516b-4dce-a245-3a4cbbe46518] => Array ( [runtime-id] => 56f20e5f-516b-4dce-a245-3a4cbbe46518 [type] => toll-free-key ) ) [credentials] => Array ( [method] => toll-free-key [value] => tf_ipsecsha;ebe292460461431afa66309723aeda8d76e27d7b ) ) ) RT Journal Article SR Electronic T1 Reply: JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP e70 OP e70 DO 10.3174/ajnr.A1491 VO 30 IS 5 A1 Isokangas, J.M. A1 Siniluoto, T. A1 Kumpulainen, T. A1 Tikkakoski, T. YR 2009 UL http://www.ajnr.org/content/30/5/e70.abstract AB