Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Phase 2 Study of KRX-0502 (Ferric Citrate) in Managing Serum Phosphorus and Iron Deficiency in Anemic Subjects With Stage III to V Chronic Kidney Disease Not on Dialysis
Brief Summary: The purpose of this study is to determine if KRX-0502 (ferric citrate) is a safe and effective treatment for the management of serum phosphorus levels and iron deficiency in anemic chronic kidney disease (CKD) stage 3-5 subjects not on dialysis. Total length of treatment is approximately 12 weeks.


Options:
A: Inclusion Criteria:

* Stage III to V Chronic Kidney Disease
* Serum Phosphorus 4.0-6.0 mg/dL prior to Randomization
* Ferritin 300 ng/mL or less
* Transferrin Saturation (TSAT) 30% or less
* Hemoglobin \>9.0 and \<12.0 g/dL
* Must consume a minimum of 2 meals per day

Exclusion Criteria:

* Parathyroidectomy within 24 weeks of study
* gastrointestinal bleed or inflammatory bowel disease within 12 weeks of study
* Requirement for dialysis or kidney injury within 8 weeks of study
* Absolute requirement for oral iron, intravenous iron, Erythropoiesis-Stimulating Agent, blood transfusions, and Sensipar during the study
* Absolute requirement for calcium-, magnesium-, or aluminum-containing drugs with meals
* Absolute requirement for vitamin C, niacin, or nicotinamide outside of multivitamins
* History of hemochromatosis
* Allergy to iron products
* History of malignancy in last 5 years
B: Inclusion Criteria:

* Male or female, and is \>=18 years old
* Stable hemodialysis or peritoneal dialysis
* Subjects has Stable phosphate control
* Subjects on Stabilized phosphorus diet
* Subjects undergoing regular dialysis treatment
* Female and of child-bearing potential have a negative serum pregnancy test.
* Male subjects must agree to use appropriate contraception.

Exclusion Criteria:

* Current clinically significant medical comorbidities, which may substantially compromise subject safety, or expose them to undue risk, or interfere significantly with study procedures and which, in the opinion of the Investigator, makes the subject unsuitable for inclusion in the study.
* serum albumin level \< 3.0g/dL
* PTH level \> 1000pg/mL
* Hemoglobin level \< 8mg/dL
* A History of significant gastrointestinal motility problems
* Biliary obstruction or proven liver dysfunction
* A positive test for hepatitis B surface antigen, hepatitis C antibody or HIV 1 and 2 antibodies
* A clinically significant severe lactose intolerance or sensitivity
* A history of substance or alcohol abuse within the last year.
* Seizure disorders
* A history of drug or other allergy
* using cholestyramine, colestipol or colesevelam
* Schedule to receive a kidney transplant within the next 6 months
* Participation in a clinical study with any experimental medication in the last 30 days or an experimental biological product within the last 90 days prior to signing of informed consent
C: Inclusion Criteria:

* CKD stage 4 patients
* Older than 18 years of age
* Non-diabetic
* Serum phosphorus \> 5.5 mg/dl

Exclusion Criteria:

* Diabetes mellitus
* History of coronary artery disease
* Smokers
* Taking statins or renin-angiotensin blockers
D: Inclusion Criteria:

* We will include stage 3a, 3b and 4 CKD patients, aged 18 years or over with normal serum phosphate levels (≤ 4.6 mg/dl)

Exclusion Criteria:

* Patients with rapidly advancing renal failure who thus might develop hyperphosphatemia or end stage renal disease requiring initiation of dialysis during the study period
* Patients expected to require dialysis initiation within the follow up period
* Patients with hyperphosphatemia \> 4.6 mg/dl
* Patients with any previous or current treatment with phosphate binders or active vitamin D (doxercalciferol or calcitriol)
* Malnutrition, defined as a serum albumin \< 3.0 mg/dl
* Patients with liver disease (ALT or AST \> 100 U/L) or cholestasis (direct bilirubin \> 1.0 mg/dl) because this can limit their ability to absorb fat soluble vitamins such as vitamin D
* Anemia, defined as a hematocrit \< 27% at the screening visit
* Medical conditions impacting Pi metabolism-primary hyper- or hypoparathyroidism; Patients with previous subtotal parathyroidectomy; gastrointestinal malabsorption disorders such as Crohn's Disease, ulcerative colitis, celiac disease, or severe liver dysfunction;
* Patients with outpatient counseling by a renal nutritionist within the previous 6 months
* Hospitalization within the previous 4 weeks
* Pregnancy or breastfeeding mothers
* Patients unable to independently provide written informed consent - prisoners, mentally incompetent, minors

Answer: A