function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 5],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 3],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 8],
    ['Info Flora', 6],
    ['Jarvis, Charlie', 37],
    ['Johnson, Paul J.', 8],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 6],
    ['Linnaeus, Carolus', 22],
    ['Merrill, Elmer Drew & Perry, Lily May', 3],
    ['Rogers, Zachary S.', 10],
    ['Stevens, Peter Francis', 3],
    ['Tabell, Jukka & Kullberg, Jaakko & Mutanen, Marko', 64],
    ['Tabell, Jukka & Mutanen, Marko & Sihvonen, Pasi', 7],
    ['Velazco, Paúl M. & Voss, Robert S. & Fleck, David W.', 4],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 3],
    ['Other (30)', 34]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=223)',
    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);