function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akrami, Mohammad Ali', 1],
    ['Bolger, Thomas', 1],
    ['Ermilov, Sergey G. & Shtanchaeva, Umukusum Ya. & Subias, Luis S.', 1],
    ['Hushtan, Habriel H. & Hushtan, Kateryna V. & Glotov, Sergii V.', 2],
    ['Murvanidze, Maka & Mumladze, Levan', 4],
    ['Murvanidze, Maka & Todria, Nino & Maraun, Mark & Mumladze, Levan', 1],
    ['Norton, Roy A. & Ermilov, Sergey G.', 3],
    ['Ryabinin, Nikolay A. & Liu, Dong & Gao, Meixiang & Wu, Dong-Hui', 1],
    ['Schatz, Heinrich & Fortini, Lorenzo & Fusco, Tommaso', 1],
    ['Seniczak, Stanisław & Ivan, Otilia & Marquardt, Tomasz', 1],
    ['Suzuoka, Hiroshi & Aoki, Jun-Ichi', 1],
    ['Weigmann, G. & Miko, L.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);