Check the sentence, please: Scope of examination: a repeated examination of the brain (compared to the previous one as of 04/16/21) Is it correct to say "dated 04/16/21" or from 04/16/21" in this case?

Which phrase is correct? The previous examination from November 12, 2021 The previous examination dated November 12, 2021 The previous examination as of November 12, 2021

Which record at the end of the document is more common: "Stamp here" or "L.S." ?

Please check this text and correct the mistakes: Within first and second day, short term reactions may occur that usually go away within three following days. The constitutional ones include flu-like syndrome, characterized by shiver, fever, arthralgia, myoneuralgia, asthenic reaction, general feeling of being unwell and headache. The local reactions are: pain at the injection site, hyperemia and swelling. Feeling sick, dyspepsia, loss of appetite and increasing of regional lymph nodes are reported less frequently. Allergic reactions may occur. It is not recommended to wet the injection site, take a sauna and drink alcohol within three days after vaccination. You should also avoid strenuous physical activity. Take antihistamines if there is redness and pain at the injection site and non-steroidal anti-inflammatory drugs in case of fever.

Which prepositon is more preferable in the phrase: in the territory of Russia/on the territory of Russia?

Which phrase sounds more natural: phone a call-center or contact a call-center?

I have a question about an Affidavit which is purposed for Canadian translators. Here is the extract from the text: 'I have read the document affixed hereto and marked Exhibit “A” to this, my declaration, which is written in the Russian language and I have read over the translated document which is written in the ENGLISH language, which is marked Exhibit “B” to this Declaration and I declare that the contents of the document are the same as the contents of the Russian document.' Can you explain, please, what inormation should be written instead of "A" and "B" or these marks should be in the text of the declaration as they are?

While talking about university disciplines and terms which expression is more common: practical training or internship?