function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Azuelo, Andrea G. & Tan, Benito C. & Shevock, James R.', 1],
    ['Blaschke, F.', 2],
    ['Brinda, John C. & He, Si & Atwood, John J. & Magill, Robert E.', 2],
    ['Darby, Michael', 4],
    ['Gobi, Christoph Jakoblewitsch', 1],
    ['Gomes do Nascimento, Géssica Maria', 1],
    ['Hebert, E.', 3],
    ['Kaczmarek, Łukasz', 1],
    ['Maier, Eva & Price, Michelle J.', 1],
    ['Matthews, Andrew', 1],
    ['Pantović, Jovana & Veljić, Milan & Grdović, Svetlana', 1],
    ['Price, Michelle J.', 7],
    ['Thouvenot, Louis & Müller, Frank', 2],
    ['Vorst, Oscar', 3],
    ['Yi, Zhao-Qin & Mu, Li-Qiang & Jia, Yu', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    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);