1. Increasing age-adjusted risk of fragility fractures: A sign of increasing osteoporosis in successive generations?

   • Karl J. Obrant
   • Urban Bengnér
   • Ingemar Sernbo

   Editorial Pages: 157 - 167

2. Change in vertebral shape in spinal osteoporosis

   • L. R. Hedlund
   • J. C. Gallagher
   • Sherill Stoner

   Clinical Investigations Pages: 168 - 172

3. Decreased bone formation in osteoporotic patients compared with age-matched controls

   • M. Garcia Carasco
   • M. C. de Vernejoul
   • L. Miravet

   Clinical Investigations Pages: 173 - 175

4. Increase of vertebral density by combination therapy with pulsatile 1-38hPTH and sequential addition of calcitonin nasal spray in osteoporotic patients

   • Rolf-Dieter Hesch
   • Ulrike Busch
   • Ernst-Friedrich Rittinghaus

   Clinical Investigations Pages: 176 - 180

5. Effect of menopause and aging on serum total and ionized calcium and protein concentrations

   • Lori J. Sokoll
   • Bess Dawson-Hughes

   Clinical Investigations Pages: 181 - 185

6. Arachidonic acid stimulates cell growth in an osteoblastic cell line, MC3T3-E1, by noneicosanoid mechanism

   • Akira Fujimori
   • Masaharu Tsutsumi
   • Takuo Fujita

   Laboratory Investigations Pages: 186 - 191

7. Differential effects of parathyroid hormone on protein phosphorylation in two osteoblastlike cell populations isolated from neonatal mouse calvaria

   • Nancy S. Krieger
   • Thomas J. Hefley

   Laboratory Investigations Pages: 192 - 199

8. Osteonectin inhibitingde novo formation of apatite in the presence of collagen

   • Y. Doi
   • R. Okuda
   • H. Shimokawa

   Laboratory Investigations Pages: 200 - 208

9. Cyclic nucleotides and the rapid inhibitions of bone⁴⁵Ca uptake in response to bovine parathyroid hormone and 16,16-dimethyl prostaglandin E₂ in chicks

   • A. J. Shaw
   • C. G. Dacke

   Laboratory Investigations Pages: 209 - 213

10. Separate binding sites for intact PTH 1-84 and synthetic PTH 1-34 in canine kidney

    • Juan C. Garcia
    • Charles L. McConkey
    • Kevin J. Martin

    Laboratory Investigations Pages: 214 - 219

11. Identification of osteoblast-specific monoclonal antibodies

    • Tamotsu Nakano
    • Shigenari Kimoto
    • Shigeru Saito

    Molecular and Cellular Biology Pages: 220 - 227

12. Performance evaluation of a dual-energy X-ray bone densitometer

    • Richard Mazess
    • Bruce Collick
    • James Hanson

    Rapid Communication Pages: 228 - 232

13. Announcements

    Announcement Pages: 233 - 233

14. Effects of cations on cartilage structure: Swelling of growth plate and degradation of proteoglycans induced by chelators of divalent cations

    • Robert D. Campo

    Erratum Pages: 234 - 234

15. Reduced strength of rat cortical bone after glucocorticoid treatment

    • Gitte Ørtoft
    • Hans Oxlund

    Erratum Pages: 234 - 234