Please select the eligibility criteria that correspond to the clinical trial below.
Title: An 8-week Randomized, Double Blind, Multi-center, Placebo-controlled Study To Evaluate The Efficacy, Safety And Tolerability Of Pregabalin ( 300mg/Day ) Using A Fixed Dosing Schedule In The Treatment Of Subjects With Postherpetic Neuralgia ( Phn )
Brief Summary: To prove pregabalin is effective in relieving pain compared with placebo in subjects with postherpetic neuralgia (PHN).


Options:
A: Inclusion Criteria:

* Patients must have pain present for more than 3 months after the healing of the herpes zoster skin rash.
* At screening (V1) and enrollment (V2), patients must have a score of greater than or equal to 4 on the Pain Numeric Rating Scale (1 week recall period).
* At enrollment (V2), at least 4 pain diaries must be completed satisfactorily within the last 7 days and the average pain score must be greater than or equal to 4.
* Male or female of any race, at least 18 years of age, and using appropriate methods of contraception

Exclusion Criteria:

* Creatinine clearance \<30 mL/min (estimated from serum creatinine).
* Skin conditions in the affected dermatome that could alter sensation
* Pregabalin use in the last 30 days. Subjects taking pregabalin in the last 30 days should be washed out of pregabalin for at least 30 days prior to screening visit. Patients who had not responded to pregabalin
B: Inclusion Criteria:

* Subject is between the ages of 18 to 75 years with a diagnosis of diabetes mellitus and must have a diagnosis of painful distal symmetric diabetic polyneuropathy and presence of ongoing pain due to diabetic peripheral neuropathy for at least 6 months.
* Subject must have an average score of greater than or equal to ( ≥) 4 on the 24 hour average pain score (0-10 numerical rating scale) collected over approximately 7 days prior to the Baseline Visit.

Exclusion Criteria:

* Subject has clinically symptomatic neuropathic pain conditions that can not be distinguished from Diabetic Neuropathic Pain (DNP) or interfere with the pain assessments of DNP.
* A subject has newly diagnosed or clinically significant medical conditions or mental disorders that would preclude participation or would interfere with DNP assessments or other functions.
* Subject has clinically significant abnormalities in clinical laboratory tests.
C: Inclusion Criteria:

* Male or female Chinese subjects, ages ≥18 at screening
* Subjects with symptoms of neuropathic pain associated with postherpetic neuralgia (PHN). Subjects must have pain present for ﹥3 months after healing of the acute herpes zoster skin rash
* At screening (V1), subjects must have a score ≥40mm on the 100-mm visual analog scale (VAS) of the Short Form-McGill Pain Questionnaire (SF-MPQ, see Appendix 3)
* At randomization (V2), subjects must have a score ≥40mm on the 100-mm visual analog scale (VAS) of the Short Form-McGill Pain Questionnaire (SF-MPQ, see Appendix 3)
* At randomization (V2), subjects must have completed at least 5 daily pain diaries (DPRS, see Appendix 2) and have an average daily pain score ≥4 over the past 7 days

Exclusion Criteria:

* Subjects who demonstrate a high response to placebo, with 30% decrease on the Pain Visual Analog Scale (VAS) at randomization as compared to screening
* Subjects who have a high variability in pain scores during the 1 week screening period, with any difference between two scores ﹥3
D: Inclusion Criteria:

* Subjects with confirmed diagnosis of HIV infection
* HIV-associated neuropathic pain (nerve pain) for at least 3 months prior to study start
* subjects with moderate to severe pain
* subjects on stable HIV and pain medications (some medications are not allowed to be taken while participating in the study).

Exclusion Criteria:

* Pregnant or breast feeding females
* subjects using street drugs or alcohol abusers during the study
* subject's on anti-diabetic medications
* use of neuroregenerative agents or neurotoxic chemotherapeutic agents 3 months prior to study start and throughout the study
* use of neurotoxic drugs (other than D-drugs) within a month prior to study start and throughout the study.

Answer: C