Please select the eligibility criteria that correspond to the clinical trial below.
Title: Vitamin D Status: Relative Efficacy of Vitamins D2 and D3
Brief Summary: Vitamin D2 in chronic dosing will produce less of an elevation of serum 25(OH)D than will the same dose of vitamin D3.


Options:
A: DISEASE CHARACTERISTICS: Primary operable stage I (tumors at least 1 cm), stage II, and stage IIIA invasive breast carcinoma Treatment within the past 4 years by total mastectomy and axillary dissection, or breast sparing surgical removal of cancer with clear macroscopic margins and axillary dissection followed by adjuvant breast radiation No evidence of recurrent disease or new breast cancer since completion of initial local treatment confirmed within the past 6 months by physician evaluation, except stage I mastectomy, for which physician evaluation can be within 1 year prior to randomization Hormone receptor status: Not specified

PATIENT CHARACTERISTICS: Age: 18 to 70 at time of diagnosis Sex: Female Menopausal status: Not specified Performance status: Not specified Life expectancy: At least 10 years (excluding breast cancer) Hematopoietic: Not specified Hepatic: No cirrhosis Renal: Not specified Other: Not pregnant Accessible geographically and by telephone Able to communicate dietary data via 24-hour food recall Able to commit to the intervention schedule No comorbidity requiring a specific diet or taking a medication which contraindicates consuming a high fiber diet (e.g., systemic scleroderma, other digestive malabsorption syndromes, and insulin dependent diabetes) No other primary or recurrent invasive cancer within the past 10 years except nonmelanoma skin cancer or carcinoma in situ of the cervix

PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: No concurrent chemotherapy Endocrine therapy: No concurrent estrogen replacement therapy, including vaginal estrogen creams Radiotherapy: See Disease Characteristics Surgery: See Disease Characteristics Other: No concurrent enrollment in another clinical trial that has dietary restrictions or endpoints similar to this study
B: Inclusion Criteria: healthy women ages 55 and older who were at least four years postmenopausal living independently in a nine-county rural area of Nebraska

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Exclusion Criteria:

1) chronic kidney disease, 2) Paget's metabolic bone disease, and 3) history of cancer except for superficial basal or squamous cell carcinoma of the skin and

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C: Inclusion Criteria:

* ambulatory

Exclusion Criteria:

* hypercalcemia
* hypercalciuria \> 4 mg/kg body weight/day
* primary, secondary, or tertiary hyperparathyroidism
* renal insufficiency (serum creatinine \> 2 mg/dL )
* history of nephrolithiasis
* treatment with vitamin D (ergocalciferol, cholecalciferol, calcitriol)
* treatment with anticonvulsants
* Paget's disease
* severe cardiac, pulmonary, hepatic, renal, or neurological disease
* life expectancy \< 1 year
* participation in another trial
D: Inclusion Criteria:

* willingness to withhold supplement use for duration of study
* willingness to avoid sun exposure for duration of study

Exclusion Criteria:

* vitamin D supplement use
* conditions that affect vitamin D metabolism by the body

Answer: D