function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 3],
    ['Blake, Joseph (Rev.)', 1],
    ['Boeckeler, Johann Otto', 1],
    ['Danylyk, Ivan M. & Koopman, Jacob', 1],
    ['Dey, Sangita & Prasanna, Parigi Venkateswara', 3],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 3],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 18],
    ['Info Flora', 2],
    ['Jarvis, Charlie', 6],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 2],
    ['Kukenthal, G.', 2],
    ['Moraes, Pedro Luís Rodrigues De', 1],
    ['Oliveira, Adriana & Bove, Claudia', 28],
    ['Silva, Caio Lima Braga da & Nunes, Clebiana de Sá', 17],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 70],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=162)',
    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);