1. Is citrate an inhibitor of calcium oxalate crystal growth in high concentrations of urine?

   • H. Bek-Jensen
   • A. -M. Fornander
   • H. -G. Tiselius

   Original Paper Pages: 67 - 71

2. Potential contribution of optional urease-positive bacteria to idiopathic urinary calcium stone formation

   • D. B. Leusmann
   • F. Sabinski

   Original Paper Pages: 73 - 78

3. Isoelectric focusing of Tamm-Horsfall glycoproteins: a simple tool for recognizing recurrent calcium oxalate renal stone formers

   • P. Schnierle
   • F. Hering
   • H. Seiler

   Original Paper Pages: 79 - 82

4. Microcalorimetric measurements carried out on isolated tumorous and nontumorous tissue samples from organs in the urogenital tract in comparison to histological and impulse-cytophotometric investigations

   • M. Kallerhoff
   • M. Karnebogen
   • R. -H. Ringert

   Original Paper Pages: 83 - 91

5. In vivo, synergestic inhibition of MAT-LyLu rat prostatic adenocarcinoma growth by polyamine deprivation and low-dose cyclophosphamide

   • B. Cipolla
   • Y. Blanchard
   • J. -P. Moulinoux

   Original Paper Pages: 93 - 99

6. Announcements

   Announcement Pages: 100 - 100

7. Circulating immune markers in advanced renal cell carcinoma during immunotherapy with interferon gamma

   • K. Höbarth
   • A. Hallas
   • M. Marberger

   Original Paper Pages: 101 - 106

8. Polymerase chain reaction in the diagnosis of urinary tract tuberculosis

   • P. van Vollenhoven
   • C. F. Heyns
   • T. Victor

   Original Paper Pages: 107 - 111

9. The ileopsoas tunnel, a new antireflux technique for ureteroileal reimplantation: an experimental study in dogs

   • H. Kato
   • H. Abol-Enein
   • M. A. Ghoneim

   Original Paper Pages: 113 - 118

10. A retrospective quality analysis of 102 randomized trials in four leading urological journals from 1984–1989

    • V. Lent
    • A. Langenbach

    Original Paper Pages: 119 - 122