function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barcelos, Luis MD & Rodrigues, Pedro R & Bried, Joel', 4],
    ['Becherer', 3],
    ['Blanca, Gabriel & Carmona, Rafael & Cueto, Miguel', 2],
    ['Blanca, Gabriel & Cueto, Miguel & Fuentes, Julián', 1],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 9],
    ['Ferrer-Gallego, P. Pablo & Sáez, Llorenç & Laguna, Emilio', 1],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 15],
    ['Info Flora', 15],
    ['Jarvis, Charlie', 27],
    ['Jeanmonod, Daniel & Schlüssel, André', 1],
    ['Jeanmonod, Daniel & éd.', 1],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 11],
    ['LeCroy, Mary', 2],
    ['Popovich, Anton V. & Zernov, Alexander S.', 2],
    ['Reich, Dieter & Gutermann, Walter & Bardy, Katharina', 1],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=96)',
    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);