function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Allibert, A.', 2],
    ['Beljaev, Еvgeniy A. & Titova, Olga L.', 5],
    ['Deane, Cedric', 1],
    ['Knyazev, S. A.', 1],
    ['Kuzmin, A. A. & Beljaev, E. A.', 1],
    ['Matthews, Andrew', 2],
    ['Newman, Edward', 1],
    ['Rybalkin, S. A. & Beljaev, E. A.', 4],
    ['Rybalkin, S. A. & Benedek, B. & Dubatolov, V. V.', 2],
    ['W, M.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);