"lesser effects" is correct and usable in written English.
It is usually used in comparison to something greater. For example, you could say "The drug had lesser effects than we expected."
To simulate natural death causes for unicells, a random death cause is introduced which effectively kills these accumulated unicells while having lesser effects on the smaller, faster replicating unicells much (because these smaller cells replicate multiple times before succumbing to random death).
Increasing either KoAPR or Qd alone had lesser effects.
Frost heaving and thaw settlement tend to damage the surface treatments and have lesser effects on railway operation.
The removal of the ignition delay as a main influence on the combustion process enabled the observation of the lesser effects of adiabatic flame temperature.
EP under conditions of constant charge transfer revealed that the applied voltage was the main determinant for transgene expression efficiency while other pulse parameters had lesser effects.
By contrast, in the un-modified alginate scaffolds, the cells aggregated into compacted clusters resulting in lesser effects of TGF-β1.
It acts on opioid receptors in the intestinal wall with lesser effects on muscarinic receptors to inhibit peristalsis; it may also have an inhibitory effect on secretions.
Geographic location exhibited lesser effects on the transcriptome, with 23.5% of genes differentially expressed between the northern Gulf of Mexico and the southeastern U.S. Atlantic locations.
A trial may have been unpublished not just to hide lesser effects but because its quality was poor — because patients were enrolled incorrectly, groups were assigned improperly or the cohort sizes were too small.
An increased understanding of tumor biology and the radiation response has led to the nomination of several pathways whose targeted inhibition has the potential to radiosensitize tumor cells with lesser effects on normal tissues.
But there are problems in analyzing published and unpublished trials in a "meta-trial". A trial may have been unpublished not just to hide lesser effects but because its quality was poor — because patients were enrolled incorrectly, groups were assigned improperly or the cohort sizes were too small.
