function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cesar, Enrique & Bandala, Victor M. & Montoya, Leticia', 2],
    ['Cooper, Jerry A. & Leonard, Pat L.', 3],
    ['Filippova, Nina & Zvyagina, Elena & Rudykina, Elena', 4],
    ['Hughes, Karen W. & Petersen, Ronald H.', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 1],
    ['Li, Ji-Peng & Antonin, Vladimir & Gates, Genevieve & Jiang, Lu', 3],
    ['Li, Ji-Peng & Li, Yu & Li, Tai-Hui & Antonín, Vladimír', 2],
    ['Li, Ji-Peng & Song, Bin & Feng, Zhan & Wang, Jing', 1],
    ['Mao, Ning & Liu, Hong & Fan, Li', 1],
    ['Petersen, Ronald H. & Hughes, Karen W.', 16],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=37)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);