function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bariche, Michel & Fricke, Ronald', 1],
    ['Bleeker, Pieter', 2],
    ['Bogorodsky, Sergey V. & Alpermann, Tilman J. & Mal, Ahmad O.', 1],
    ['Dutt, S. & Sujatha, K.', 2],
    ['Fricke, Ronald & Allen, Gerald R. & Andréfouët, Serge', 1],
    ['Fricke, Ronald & Golani, Daniel & Tikochinski, Yaron', 1],
    ['Golani, Daniel', 2],
    ['Golani, Daniel & Fricke, Ronald', 1],
    ['Golani, Daniel & Fricke, Ronald & Tikochinski, Yaron', 2],
    ['Grzelak, Katarzyna & Sørensen, Martin V.', 1],
    ['Hardenberg, J. D. F.', 1],
    ['Ho, Hsuan-Ching', 1],
    ['Ho, Hsuan-Ching & Shao, Kwang-Tsao', 2],
    ['KAGA, TATSUYA', 3],
    ['McKay, Roland J.', 2],
    ['Other (16)', 16]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=39)',
    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);