function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahamada H. Saïd & Sabine Hennequin & Germinal Rouhan', 14],
    ['Alderwerelt van Rosenburgh, Capt. C. R. W. K.', 2],
    ['Blume, Carl Ludwig von', 1],
    ['Brause, Guido Georg Wilhelm', 3],
    ['Carmes, Amanda Angélica & Dechoum, Michele de Sá', 2],
    ['Chang, Zhi-Xiang & Hsu, Tian-Chuan & Kuo, Li-Yaung', 1],
    ['Christenhusz, Maarten J. M. & Zhang, Xian-Chun', 1],
    ['Christensen, Carl C.', 2],
    ['Cremers, Georges & Flament, Grégoire & Boudrie, Michel', 1],
    ['Grimes, M.', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 2],
    ['Jang, Hyun-Do & Hyun, Chang-Woo & Ryu, Seah & Lee, Sang-Jun', 1],
    ['Jarvis, Charlie', 3],
    ['Rosenstock, Eduard', 5],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 4],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    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);