Bertholf, PhD, Roger L., United States

• Vol 11, No 1 (2015): January/February - Articles
  Choosing the right laboratory: A review of clinical and forensic toxicology services for urine drug testing in pain management
  Abstract
• Vol 3, No 4 (2007): July/August - Editorial
  Opiates and opioids: What a difference a name makes
  Details  PDF
• Vol 3, No 6 (2007): November/December - Articles
  Family physicians’ proficiency in urine drug test interpretation
  Abstract