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The first trial, published in 1990 (159), was the only one to tick all the boxes in the report under the Cochrane banner (1) : an attempt to gauge quality-of-life used questionnaires based on patients with chronic backache, inappropriate in retrospect but the best available at the time
Assessment: penile tumescence (RigiScan), duration of erection, subjective satisfaction, side effects
"For some people, having a pill option can fit better into their daily routines
Differing cytotoxicity and bioavailability of selenite, methylselenocysteine, selenomethionine, selenosugar 1 and trimethylselenonium ion and their underlying metabolic transformations in human cells
Together, these innovations are broadening routes of administration (injectable vials, pens, oral tablets) and patient access, reshaping manufacturing needs