function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 4],
    ['Hooker, Joseph Dalton', 1],
    ['Info Flora', 5],
    ['Ito, Yu & Barfod, Anders S.', 8],
    ['Jarvis, Charlie', 4],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 5],
    ['Linnaeus, Carolus', 1],
    ['Mattfeld, Johannes', 1],
    ['Meijden, R. van', 1],
    ['Niccolini, Gabriele & Martinetto, Edoardo & Lanini, Benedetta', 1],
    ['Reveal, James L. & Chase, Mark W. & Iii, - Apg & Iii, Apg', 1],
    ['Smith, MacKenzie A. & Greenwalt, Dale E. & Manchester, Steven R.', 2],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 3],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    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);