function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bary, Brian M.', 1],
    ['Dragesco, J.', 2],
    ['Durán-Ramírez, Carlos Alberto & Dias, Roberto Júnio Pedroso', 5],
    ['Ehrenberg, Christian Gottfried', 2],
    ['Foissner, Wilhelm & Stoeck, Thorsten', 2],
    ['Ghaffar, Abdul & Bai, Yang & Hu, Xiaozhong', 2],
    ['Horváth, J. V.', 2],
    ['Jung, Jae-Ho & Park, Kyung-Min & Min, Gi-Sik', 2],
    ['Kahl, Alfred', 3],
    ['Lepsi, Iosif', 2],
    ['Stein, Friedrich', 2],
    ['Stokes, Alfred Cheatham', 12],
    ['Vuxanovici, A.', 4],
    ['Wenzel, Fritz', 2],
    ['Wilbert, Norbert & Song, Weibo', 5],
    ['Other (21)', 21]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=69)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);