function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abotsi, Komla Elikplim & Kokou, Kouami & Dubuisson, Jean-Yves', 6],
    ['Alderwerelt van Rosenburgh, Capt. C. R. W. K.', 2],
    ['Alderwerelt van Rosenburgh, Cornelis Rugier Willem Kar', 1],
    ['Arana, Marcelo D. & Yañez, Agustina & Schwartsburd, Pedro B.', 2],
    ['Brownsey, Patrick J.', 2],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 1],
    ['Christenhusz, Maarten J. M. & Zhang, Xian-Chun', 11],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 2],
    ['Jarvis, Charlie', 4],
    ['Jongkind, Carel & Winter, Wim de', 2],
    ['Kessler, Michael & Smith, Alan R. & Øllgaard, Benjamin', 5],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 3],
    ['Rosenstock, Eduard', 3],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 5],
    ['Other (14)', 14]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=65)',
    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);