function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baker, Edmund Gilbert', 1],
    ['Blume, Carl Ludwig von', 1],
    ['Esser, Hans-Joachim & Saw, Leng Guan', 1],
    ['Lauterbach, Carl (Karl) Adolf Georg', 1],
    ['Mattfeld, Johannes', 1],
    ['Pillon, Yohan', 6],
    ['Reeder, John Raymond', 6],
    ['Royen, Pieter van', 1],
    ['Schlechter, Fridrich Richard Rudolf', 2],
    ['Schmidt, Otto Christian', 1],
    ['Takeuchi, Wayne N.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);