function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['AL-Shehbaz, Ihsan A. & Barriera, Gabrielle', 15],
    ['Al-Shehbaz, Ihsan A.', 2],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 3],
    ['Elias Landolt', 2],
    ['German, Dmitry A.', 3],
    ['Hans Ernst Hess & Elias Landolt & Rosmarie Hirzel', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 12],
    ['Info Flora', 10],
    ['Jarvis, Charlie', 20],
    ['Konrad Lauber & Gerhart Wagner', 6],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 10],
    ['Lange, P. J. de & Heenan, P. B. & Houliston, G. J.', 16],
    ['Rūrāne, Ieva & Roze, Ieva', 11],
    ['Sokoloff, Paul C. & Freebury, Colin E. & Hamilton, Paul B.', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 2],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=122)',
    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);