function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud S. & Elgharbawy, Ali A. & Rasool, Iftekhar', 2],
    ['Abdel-Dayem, Mahmoud S. & Fad, Hassan H. & El-Torkey, Ashraf M.', 1],
    ['Abdel-Dayem, Mahmoud S. & Rasool, Iftekhar & Elgharbawy, Ali A.', 1],
    ['Ahmadi, Marzieh & Esfandiari, Mehdi & Muilwijk, Jan', 1],
    ['Assmann, Thorsten & Boutaud, Esteve & Buse, Joern', 3],
    ['Aston, Paul', 1],
    ['Azadbakhsh, Saeed & Nozari, Jamasb', 1],
    ['Damken, Claas & Wiesner, Jürgen & Wahab, Rodzay Abdul', 1],
    ['Dangalle, Chandima & Pallewatta, Nirmalie & Vogler, Alfried', 1],
    ['Felix, Ron F. F. L. & Farkač, Jan & Suleiman, Ahmed Saeed', 1],
    ['Jaskuła, Radomir & Wiesner, Jürgen', 1],
    ['Matalin, Andrey V. & Chikatunov, Vladimir I.', 1],
    ['Merene, Yeshitla & Lorenz, Wolfgang & Opgenoorth, Lars', 3],
    ['Serrano, Artur R. M.', 6],
    ['Wiesner, Jürgen & Bandinelli, Aligi & Matalin, Andrey', 2],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);