function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cedeno-Sanchez, Marjorie & Charria-Giron, Esteban', 4],
    ['Ganeshalingam, Archchana & Daranagama, Dinushani A.', 1],
    ['Jarvis, Charlie', 1],
    ['Karimi, Omid & Thilini Chethana, K. W. & Farias, Antonio R. G.', 1],
    ['Song, Zikun & Pan, Xiaoyan & Li, Changtian & Ma, Hai-Xia', 2],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 5],
    ['de la Fuente, Javier Isaac & García-Jiménez, Jesús', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);