function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alderwerelt van Rosenburgh, Capt. C. R. W. K.', 2],
    ['Almeida, Thais Elias & Salino, Alexandre', 2],
    ['Carmes, Amanda Angélica & Dechoum, Michele de Sá', 2],
    ['Christ, Konrad Hermann Heinrich', 1],
    ['Christenhusz, Maarten J. M. & Zhang, Xian-Chun', 1],
    ['Christensen, Carl C.', 1],
    ['Holttum, Richard Erick', 17],
    ['Jarvis, Charlie', 1],
    ['Kessler, Michael', 1],
    ['Kessler, Michael & Smith, Alan R. & Øllgaard, Benjamin', 6],
    ['Robert, Yannis & Thomas, Hermann & Tamon, Jean Maurice', 1],
    ['Rosenstock, Eduard', 3],
    ['Roux, Jacobus P.', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);