function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anlaş, S.', 1],
    ['Anlaş, S. & A. F', 1],
    ['Anlaş, Sinan', 1],
    ['Assing, V.', 2],
    ['Assing, V. & Feldmann, B.', 9],
    ['Assing, Volker', 10],
    ['Feldmann, Benedikt & Peng, Zhong & Li, Li-Zhen', 11],
    ['Lin, Xiao-Bin & Peng, Zhong', 8],
    ['Outerelo, R. & Gamarra, P.', 1],
    ['Peng, Zhong & Sun, Zhuo & Li, Li-Zhen & Zhao, Mei-Jun', 3],
    ['Reboleira, A. S. P. S. & Gonçalves, F. & Oromí, P.', 3],
    ['Serrano, Artur R. M. & Conde, José & Antunes, Sandra', 2],
    ['Struyve, Tim', 5],
    ['Zhao, Mei-Jun', 13],
    ['Čeplík, Dávid', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=71)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);