function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Jiao, Jiao & Chang, Yan-Lin & Shi, Fu-Ming', 1],
    ['Jin, Xingbao & Liu, Xianwei & Wang, Hanqiang', 1],
    ['Kim, Tae-Woo & Puskás, Gellért', 1],
    ['Shi, Fu-Ming & Bai, Jin-Rong & Zhang, Ying & Chang, Yan-Lin', 1],
    ['Tan, Ming Kai & Kamaruddin, Khairul Nizam', 1],
    ['Wang, Hanqiang & Liu, Xianwei', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=7)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);