function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Liu, Li-Rong & Wang, Geng-Shen & Jia, Liu-Kun & Kang, Ju-Qing', 1],
    ['Nanu, Salna & Arun Kumar, T. K.', 2],
    ['Xie, Hui-Jing & Zhang, Chun-Xia & He, Ming-Xia & Liang, Zhi-Qun', 1],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 1],
    ['de la Fuente, Javier Isaac & García-Jiménez, Jesús', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=6)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);