function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baba, Kikutaro', 1],
    ['Baker, Edmund Gilbert', 1],
    ['Blume, Carl Ludwig von', 2],
    ['Brady, George Stewardson', 4],
    ['Candolle, Anne Casimir Pyramus de', 5],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 1],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 1],
    ['Gibbs, Lilian Suzette', 1],
    ['Harms, Hermann August Theodor', 8],
    ['Harneti, Desi & Supratman, Unang', 1],
    ['Merrill, Elmer Drew & Perry, Lily May', 10],
    ['Pannell, Caroline M.', 3],
    ['Pannell, Caroline M. & Schnitzler, Jan', 3],
    ['Rechinger, Karl Heinz', 2],
    ['Takeuchi, Wayne N.', 2],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=47)',
    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);