function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bickel, Daniel J.', 6],
    ['Bächli, Gerhard & Merz, Bernhard & Haenni, Jean-Paul', 1],
    ['Capellari, Renato Soares', 1],
    ['Dawah, Hassan A. & Ahmad, Syed Kamran & Abdullah, Mohammed A.', 1],
    ['Grichanov, Igor Ya.', 1],
    ['Kechev, Mihail & Naglis, Stefan & Tonguç, Alper & Pollet, Marc', 4],
    ['Naglis, Stefan', 1],
    ['Naglis, Stefan & Barták, Miroslav', 1],
    ['Negrobov, Oleg P. & Grichanov, Igor Ya. & Selivanova, Olga V.', 17],
    ['Parent, Octave', 19],
    ['Pollet, Marc & Andrade, Rui & Gonçalves, Ana & Andrade, Pedro', 2],
    ['Pollet, Marc & Persson, Magnus & Bøggild, Esben & Crossley, Roy', 2],
    ['Runyon, Justin B.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=58)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);