function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anlaş, S.', 1],
    ['Assing, V.', 26],
    ['Assing, Volker', 11],
    ['Haberski, Adam & Caterino, Michael S.', 2],
    ['Kocian, Matúš & Hlaváč, Peter', 6],
    ['Koszela, Katarzyna & Sarmiento, Yoan Camilo Guzman', 1],
    ['Li, Xiao-Yan & Solodovnikov, Alexey & Zhou, Hong-Zhang', 8],
    ['Peng, Zhong & Li, Li-Zhen & Zhao, Mei-Jun', 6],
    ['Rougemont, Guillaume de', 18]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=79)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);