function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brady, George Stewardson', 61],
    ['Conrad, Timothy Abbot', 1],
    ['Guernet, Claude & Huyghe, Damien & Lartaud, Franck', 9],
    ['Guernet, Claude & Villier, Loïc', 1],
    ['Meisch, Claude & Smith, Robin J. & Martens, Koen', 2],
    ['Nakao, Yuriko & Tsukagoshi, Akira', 1],
    ['Perez-Gelabert, Daniel E.', 1],
    ['S, Raphaël', 2],
    ['Schornikov, Evgeny I.', 3],
    ['Wannenmacher, Norbert & Dietze, Volker & Franz, Matthias', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=83)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);