1naresh2naresh<pre>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
                )

        )

    [34b18842-b2e4-4432-b2a0-ab0e3312b7fc] => Array
        (
            [runtime-id] => 34b18842-b2e4-4432-b2a0-ab0e3312b7fc
            [type] => toll-free-key
            [service-id] => ajnr-ac.highwire.org
            [access-type] => Controlled
            [privilege] => Array
                (
                    [972367d2-8b72-4c36-9e71-2fc26fedca57] => Array
                        (
                            [runtime-id] => 972367d2-8b72-4c36-9e71-2fc26fedca57
                            [type] => toll-free-key
                        )

                )

            [credentials] => Array
                (
                    [method] => toll-free-key
                    [value] => tf_ipsecsha;a5a40b97ad676a553e5ca054055b0a1bedf1827d
                )

        )

)
1naresh2naresh<pre>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] => 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
                )

        )

    [2ad7b36f-f927-4609-a6b9-c5565fd90659] => Array
        (
            [runtime-id] => 2ad7b36f-f927-4609-a6b9-c5565fd90659
            [type] => toll-free-key
            [service-id] => ajnr-ac.highwire.org
            [access-type] => FreeToRead
            [privilege] => Array
                (
                    [42372286-201b-4ab3-87ea-bd1636728467] => Array
                        (
                            [runtime-id] => 42372286-201b-4ab3-87ea-bd1636728467
                            [type] => toll-free-key
                        )

                )

            [credentials] => Array
                (
                    [method] => toll-free-key
                    [value] => tf_ipsecsha;a5a40b97ad676a553e5ca054055b0a1bedf1827d
                )

        )

)
PT  - JOURNAL ARTICLE
AU  - Iu, Po Ping
AU  - Lam, Hon Shing
TI  - Migrainous Spasm Simulating Carotid Dissection: A Pitfall in MR Arteriographic Findings
DP  - 2001 Sep 01
TA  - American Journal of Neuroradiology
PG  - 1550--1552
VI  - 22
IP  - 8
4099  - http://www.ajnr.org/content/22/8/1550.short
4100  - http://www.ajnr.org/content/22/8/1550.full
SO  - Am. J. Neuroradiol.2001 Sep 01; 22
AB  - Summary: An MR arteriogram obtained in a patient with migraine headaches during prodrome showed features of carotid dissection. A repeated study conducted within minutes demonstrated complete patency. Vascular spasm was proposed to be the cause. Migraine occurs in more than 10% of the population. The possibility of misdiagnosing a vascular spasm as carotid dissection is real and should be guarded against since there are great prognostic and treatment implications.