function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Assing, V.', 2],
    ['Bukejs, Andris', 1],
    ['Ghahari, H. & Anlaş, S. & Sakenin, H. & Ostovan, H.', 1],
    ['Ghahari, H. & Anlaş, S. & Sakenin, H. & Ostovan, H. & Tabari, M.', 1],
    ['Herger, Peter & Germann, Christoph & Uhlig, Manfred', 1],
    ['Japoshvili, George & Khachikov, Eduard', 1],
    ['Shavrin, A. V. & Makarov, K. V.', 1],
    ['Shavrin, Alexey V. & Kairišs, Kristaps', 2],
    ['Shavrin, Alexey V. & Yamamoto, Shuhei', 5],
    ['Watanabe, Yasuaki', 1],
    ['Watanabe, Yasuaki & Shimada, Takashi', 2],
    ['Zanetti, A.', 2],
    ['Zanetti, Adriano', 29]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=49)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);